diff --git a/about.go b/about.go
index d778987..ef5d00f 100644
--- a/about.go
+++ b/about.go
@@ -5,7 +5,6 @@ import (
 	"bytes"
 	_ "embed"
 	"fmt"
-	"net/url"
 	"strings"
 
 	"fyne.io/fyne/v2"
@@ -14,11 +13,6 @@ import (
 	"fyne.io/fyne/v2/widget"
 )
 
-func parseURL(s string) *url.URL {
-	link, _ := url.Parse(s)
-	return link
-}
-
 //go:embed metadata/en-US/full_description.txt
 var longdesc string
 
diff --git a/go.mod b/go.mod
index 6cbd2ff..9c9b1e5 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.16
 require (
 	fyne.io/fyne/v2 v2.0.0
 	github.com/schollz/croc/v8 v8.6.7
+	github.com/schollz/logger v1.2.0 // indirect
 )
 
 replace fyne.io/fyne/v2 => ./fyne-uri-name
diff --git a/main.go b/main.go
index 88b1e7a..0b68e82 100644
--- a/main.go
+++ b/main.go
@@ -1,22 +1,57 @@
 package main
 
 import (
+	"bytes"
 	_ "embed"
+	"strings"
+	"time"
+
+	log "github.com/schollz/logger"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/app"
 	"fyne.io/fyne/v2/canvas"
 	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/data/binding"
 	"fyne.io/fyne/v2/layout"
 )
 
 //go:embed metadata/en-US/images/featureGraphic.png
 var textlogobytes []byte
 
+type logwriter struct {
+	buf        bytes.Buffer
+	lastlines  []string
+	lastupdate time.Time
+}
+
+const LOG_LINES = 20
+
+func (lw *logwriter) Write(p []byte) (n int, err error) {
+	n, err = lw.buf.Write(p)
+
+	lw.lastlines = append([]string{string(p)}, lw.lastlines...)
+	if len(lw.lastlines) > LOG_LINES {
+		lw.lastlines = lw.lastlines[:LOG_LINES]
+	}
+
+	if time.Since(lw.lastupdate) > time.Second {
+		logbinding.Set(strings.Join(lw.lastlines, ""))
+		lw.lastupdate = time.Now()
+	}
+	return
+}
+
+var logoutput logwriter
+var logbinding binding.String
+
 func main() {
 	a := app.NewWithID("com.github.howeyc.crocgui")
 	w := a.NewWindow("croc")
 
+	logbinding = binding.NewString()
+	log.SetOutput(&logoutput)
+
 	// Defaults
 	a.Preferences().SetString("relay-address", a.Preferences().StringWithFallback("relay-address", "croc.schollz.com:9009"))
 	a.Preferences().SetString("relay-password", a.Preferences().StringWithFallback("relay-password", "pass123"))
@@ -26,8 +61,10 @@ func main() {
 	a.Preferences().SetBool("disable-multiplexing", a.Preferences().BoolWithFallback("disable-multiplexing", false))
 	a.Preferences().SetBool("disable-compression", a.Preferences().BoolWithFallback("disable-compression", false))
 	a.Preferences().SetString("theme", a.Preferences().StringWithFallback("theme", "light"))
+	a.Preferences().SetString("debug-level", a.Preferences().StringWithFallback("debug-level", "error"))
 
 	setTheme(a.Preferences().String("theme"))
+	log.SetLevel(a.Preferences().String("debug-level"))
 
 	textlogores := fyne.NewStaticResource("text-logo", textlogobytes)
 	textlogo := canvas.NewImageFromResource(textlogores)
@@ -41,5 +78,8 @@ func main() {
 			aboutTabItem(),
 		)))
 	w.Resize(fyne.NewSize(800, 600))
+
+	setDebugObjects()
+
 	w.ShowAndRun()
 }
diff --git a/metadata/en-US/changelogs/10.txt b/metadata/en-US/changelogs/10.txt
new file mode 100644
index 0000000..587ecba
--- /dev/null
+++ b/metadata/en-US/changelogs/10.txt
@@ -0,0 +1,2 @@
+- Settings are scrollable
+- Add debug logging
diff --git a/recv.go b/recv.go
index 6d1999f..94bacf4 100644
--- a/recv.go
+++ b/recv.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	"log"
 	"os"
 	"path/filepath"
 	"sort"
@@ -12,24 +11,42 @@ import (
 	"sync"
 	"time"
 
+	log "github.com/schollz/logger"
+
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/dialog"
+	"fyne.io/fyne/v2/layout"
 	"fyne.io/fyne/v2/theme"
 	"fyne.io/fyne/v2/widget"
 	"github.com/schollz/croc/v8/src/croc"
 )
 
 func recvTabItem(a fyne.App, w fyne.Window) *container.TabItem {
+	logInfo := widget.NewLabelWithData(logbinding)
+	logInfo.Wrapping = fyne.TextWrapWord
+
 	status := widget.NewLabel("")
 	defer func() {
 		if r := recover(); r != nil {
-			status.SetText(fmt.Sprint(r))
+			logInfo.SetText(fmt.Sprint(r))
 		}
 	}()
 
 	recvDir, _ := os.MkdirTemp("", "crocgui-recv")
 
+	debugBox := container.NewHBox(widget.NewLabel("Debug log:"), layout.NewSpacer(), widget.NewButton("Export full log", func() {
+		savedialog := dialog.NewFileSave(func(f fyne.URIWriteCloser, e error) {
+			if f != nil {
+				logoutput.buf.WriteTo(f)
+				f.Close()
+			}
+		}, w)
+		savedialog.SetFileName("crocdebuglog.txt")
+		savedialog.Show()
+	}))
+	debugObjects = append(debugObjects, debugBox)
+
 	prog := widget.NewProgressBar()
 	prog.Hide()
 	recvEntry := widget.NewEntry()
@@ -42,7 +59,7 @@ func recvTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 				receiver, err := croc.New(croc.Options{
 					IsSender:       false,
 					SharedSecret:   recvEntry.Text,
-					Debug:          false,
+					Debug:          crocDebugMode(),
 					RelayAddress:   a.Preferences().String("relay-address"),
 					RelayPassword:  a.Preferences().String("relay-password"),
 					Stdout:         false,
@@ -53,8 +70,12 @@ func recvTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 					NoCompress:     a.Preferences().Bool("disable-compression"),
 				})
 				if err != nil {
-					log.Println("Receive setup error:", err)
+					log.Error("Receive setup error:", err)
+					return
 				}
+				log.SetLevel(crocDebugLevel())
+				log.Trace("croc receiver created")
+
 				prog.Show()
 				donechan := make(chan bool)
 				var filename string
@@ -81,7 +102,7 @@ func recvTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 				}()
 				cderr := os.Chdir(recvDir)
 				if cderr != nil {
-					log.Println("Unable to change to dir:", recvDir, cderr)
+					log.Error("Unable to change to dir:", recvDir, cderr)
 				}
 				status.SetText("")
 				rerr := receiver.Receive()
@@ -90,7 +111,7 @@ func recvTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 				prog.SetValue(0)
 				topline.SetText("Enter code to download")
 				if rerr != nil {
-					status.Text = "Receive failed: " + rerr.Error()
+					log.Error("Receive failed: " + rerr.Error())
 				} else {
 					filesReceived := make([]string, len(receivednames))
 					var i int
@@ -120,18 +141,20 @@ func recvTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 								ofile = f
 								oerr = e
 								if oerr != nil {
-									status.SetText(oerr.Error())
+									log.Error(oerr.Error())
 									return
 								}
 								ifile, ierr := os.Open(path)
 								if ierr != nil {
-									status.SetText(ierr.Error())
+									log.Error(ierr.Error())
 									return
 								}
 								io.Copy(ofile, ifile)
 								ifile.Close()
 								ofile.Close()
 								os.Remove(path)
+								log.Tracef("saved (%s) to user path %s", path, f.URI().String())
+								log.Tracef("remove internal cache file %s", path)
 								diagwg.Done()
 							}, w)
 							savedialog.SetFileName(filepath.Base(path))
@@ -144,6 +167,8 @@ func recvTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 			}),
 			prog,
 			status,
+			debugBox,
+			logInfo,
 		))
 
 }
diff --git a/send.go b/send.go
index d5780e7..c934733 100644
--- a/send.go
+++ b/send.go
@@ -3,12 +3,13 @@ package main
 import (
 	"fmt"
 	"io"
-	"log"
 	"os"
 	"path/filepath"
 	"strings"
 	"time"
 
+	log "github.com/schollz/logger"
+
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/dialog"
@@ -20,10 +21,13 @@ import (
 )
 
 func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
+	logInfo := widget.NewLabelWithData(logbinding)
+	logInfo.Wrapping = fyne.TextWrapWord
+
 	status := widget.NewLabel("")
 	defer func() {
 		if r := recover(); r != nil {
-			status.SetText(fmt.Sprint(r))
+			log.Error(fmt.Sprint(r))
 		}
 	}()
 	prog := widget.NewProgressBar()
@@ -45,21 +49,23 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 	addFileButton := widget.NewButtonWithIcon("", theme.FileIcon(), func() {
 		dialog.ShowFileOpen(func(f fyne.URIReadCloser, e error) {
 			if e != nil {
+				log.Errorf("Open dialog error: %s", e.Error())
 				return
 			}
 			if f != nil {
 				nfile, oerr := os.Create(filepath.Join(sendDir, f.URI().Name()))
 				if oerr != nil {
-					status.SetText(fmt.Sprintf("Unable to copy file, error: %s - %s", sendDir, oerr.Error()))
+					log.Errorf("Unable to copy file, error: %s - %s\n", sendDir, oerr.Error())
 					return
 				}
 				io.Copy(nfile, f)
 				nfile.Close()
 				fpath := nfile.Name()
+				log.Tracef("Android URI (%s), copied to internal cache %s", f.URI().String(), nfile.Name())
 
 				_, sterr := os.Stat(fpath)
 				if sterr != nil {
-					status.SetText(fmt.Sprintf("Stat error: %s - %s", fpath, sterr.Error()))
+					log.Errorf("Stat error: %s - %s\n", fpath, sterr.Error())
 					return
 				}
 				labelFile := widget.NewLabel(filepath.Base(fpath))
@@ -67,6 +73,7 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 					if fe, ok := fileentries[fpath]; ok {
 						boxholder.Remove(fe)
 						os.Remove(fpath)
+						log.Tracef("Removed file from internal cache: %s", fpath)
 						delete(fileentries, fpath)
 					}
 				}))
@@ -76,6 +83,18 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 		}, w)
 	})
 
+	debugBox := container.NewHBox(widget.NewLabel("Debug log:"), layout.NewSpacer(), widget.NewButton("Export full log", func() {
+		savedialog := dialog.NewFileSave(func(f fyne.URIWriteCloser, e error) {
+			if f != nil {
+				logoutput.buf.WriteTo(f)
+				f.Close()
+			}
+		}, w)
+		savedialog.SetFileName("crocdebuglog.txt")
+		savedialog.Show()
+	}))
+	debugObjects = append(debugObjects, debugBox)
+
 	return container.NewTabItemWithIcon("Send", theme.MailSendIcon(),
 		container.NewVBox(
 			container.NewHBox(topline, layout.NewSpacer(), addFileButton),
@@ -91,7 +110,7 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 				sender, err := croc.New(croc.Options{
 					IsSender:       true,
 					SharedSecret:   randomName,
-					Debug:          false,
+					Debug:          crocDebugMode(),
 					RelayAddress:   a.Preferences().String("relay-address"),
 					RelayPorts:     strings.Split(a.Preferences().String("relay-ports"), ","),
 					RelayPassword:  a.Preferences().String("relay-password"),
@@ -103,9 +122,12 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 					NoCompress:     a.Preferences().Bool("disable-compression"),
 				})
 				if err != nil {
-					status.SetText("croc error: " + err.Error())
+					log.Errorf("croc error: %s\n", err.Error())
 					return
 				}
+				log.SetLevel(crocDebugLevel())
+				log.Trace("croc sender created")
+
 				var filename string
 				status.SetText("Receive Code: " + randomName)
 				currentCode = randomName
@@ -148,6 +170,7 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 						if fe, ok := fileentries[fpath]; ok {
 							boxholder.Remove(fe)
 							os.Remove(fpath)
+							log.Tracef("Removed file from internal cache: %s", fpath)
 							delete(fileentries, fpath)
 						}
 					}
@@ -155,7 +178,7 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 					topline.SetText("Pick a file to send")
 					addFileButton.Show()
 					if serr != nil {
-						log.Println("Send failed:", serr)
+						log.Errorf("Send failed: %s\n", serr)
 					} else {
 						status.SetText(fmt.Sprintf("Sent file %s", filename))
 					}
@@ -165,5 +188,7 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 			}),
 			prog,
 			container.NewHBox(status, copyCodeButton),
+			debugBox,
+			logInfo,
 		))
 }
diff --git a/settings.go b/settings.go
index 9ba5270..e28734d 100644
--- a/settings.go
+++ b/settings.go
@@ -3,6 +3,8 @@ package main
 import (
 	"crocgui/internal/croctheme"
 
+	log "github.com/schollz/logger"
+
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/data/binding"
@@ -25,6 +27,32 @@ func setTheme(themeName string) {
 	}
 }
 
+func crocDebugMode() bool {
+	switch fyne.CurrentApp().Preferences().String("debug-level") {
+	case "trace", "debug":
+		return true
+	default:
+		return false
+	}
+}
+
+func crocDebugLevel() string {
+	return fyne.CurrentApp().Preferences().String("debug-level")
+}
+
+var debugObjects []fyne.CanvasObject
+
+func setDebugObjects() {
+	debugging := crocDebugMode()
+	for _, obj := range debugObjects {
+		if debugging {
+			obj.Show()
+		} else {
+			obj.Hide()
+		}
+	}
+}
+
 func settingsTabItem(a fyne.App) *container.TabItem {
 	themeBinding := binding.BindPreferenceString("theme", a.Preferences())
 	themeSelect := widget.NewSelect([]string{"light", "dark", "black"}, func(selection string) {
@@ -33,7 +61,26 @@ func settingsTabItem(a fyne.App) *container.TabItem {
 	})
 	currentTheme, _ := themeBinding.Get()
 	themeSelect.SetSelected(currentTheme)
-	return container.NewTabItemWithIcon("Settings", theme.SettingsIcon(), container.NewVBox(
+
+	debugLevelBinding := binding.BindPreferenceString("debug-level", a.Preferences())
+	debugCheck := widget.NewCheck("Enable Debug Log", func(debug bool) {
+		if debug {
+			log.SetLevel("trace")
+			debugLevelBinding.Set("trace")
+		} else {
+			log.SetLevel("error")
+			debugLevelBinding.Set("error")
+		}
+		setDebugObjects()
+	})
+	debugCheck.SetChecked(crocDebugMode())
+
+	return container.NewTabItemWithIcon("Settings", theme.SettingsIcon(), container.NewVScroll(container.NewVBox(
+		widget.NewLabelWithStyle("Appearance", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
+		widget.NewForm(
+			widget.NewFormItem("Theme", themeSelect),
+		),
+		widget.NewSeparator(),
 		widget.NewLabelWithStyle("Relay", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
 		widget.NewForm(
 			widget.NewFormItem("Address", widget.NewEntryWithData(binding.BindPreferenceString("relay-address", a.Preferences()))),
@@ -53,9 +100,9 @@ func settingsTabItem(a fyne.App) *container.TabItem {
 			widget.NewFormItem("", widget.NewCheckWithData("Disable Compression", binding.BindPreferenceBool("disable-compression", a.Preferences()))),
 		),
 		widget.NewSeparator(),
-		widget.NewLabelWithStyle("Appearance", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
+		widget.NewLabelWithStyle("Debug", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
 		widget.NewForm(
-			widget.NewFormItem("Theme", themeSelect),
+			widget.NewFormItem("", debugCheck),
 		),
-	))
+	)))
 }