Undo (three cheers brilliant software) #5168

Shanj1991 · 2025-11-09T22:33:29Z

Shanj1991
Nov 9, 2025

Absolutely brilliant software design - uncluttered, intuitive, does all the essentials and lots of lovely extras but never gets fussy.
Suggest Undo so I can try a setting or open a file etc and then cancel that action.

GitHubRulesOK · 2025-11-10T01:38:35Z

GitHubRulesOK
Nov 10, 2025
Collaborator

hmmm not sure many users would need such an ability (and I agree although I don't see what benefit it may be others will)
Basically it is not easy to undo multiple instant changes, (but in theory should not be impossible) but a lot of work when so many changes would need monitoring.
Simplest is you set the setting file to read only at a given point in time then exit and unlock settings for when you want to run from that point in time.
previously I showed how to export part of the session history by ISO time but in your case that would be the whole file.
you could set a shortcut to copy settings via click an icon and copy with date+time

Actually thinking about it. one user shortcut key to save settings then another shortcut key to restore that same "saved-setting.txt" might be easily written as an windows external command using your current pre-release

As an example when a significant single change happens this is the starting difference between a saved and current via key click

fc  saved-settings.txt sumatrapdf-settings.txt
Comparing files saved-settings.txt and SUMATRAPDF-SETTINGS.TXT
***** saved-settings.txt
        PageSpacing = 4 4
        InvertColors = false
        HideScrollbars = false
***** SUMATRAPDF-SETTINGS.TXT
        PageSpacing = 4 4
        InvertColors = true
        HideScrollbars = false
*****

***** saved-settings.txt
        [
                FilePath = C:\Users\WDAGUtilityAccount\Documents\webview.pdf
                Favorites [
***** SUMATRAPDF-SETTINGS.TXT
        [
                FilePath = C:\Users\WDAGUtilityAccount\Documents\out.pdf
                Favorites [
*****

***** saved-settings.txt
        [
                FilePath = C:\Users\WDAGUtilityAccount\Downloads\5164.pdf
                Favorites [
***** SUMATRAPDF-SETTINGS.TXT
        [
                FilePath = C:\Users\WDAGUtilityAccount\Documents\webview.pdf
                Favorites [
*****

then about 100 lines later the end diff

***** saved-settings.txt
                ]
                TabIndex = 3
                WindowState = 1
***** SUMATRAPDF-SETTINGS.TXT
                ]
                TabIndex = 2
                WindowState = 1
*****

so no promises it can restore every state but is as easy as VERSION 3.6 pre-release

ExternalViewers [
	[
		CommandLine = c:\windows\system32\cmd.exe /c start "" /min xcopy /qry C:\Users\path to your\SumatraPDF\sumatrapdf-settings.txt C:\Users\path to your\SumatraPDF\saved-settings.txt
		Name = Save &state
		Key = s
	]
	[
		CommandLine = c:\windows\system32\cmd.exe /c start "" /min xcopy /qry C:\Users\path to your\SumatraPDF\saved-settings.txt C:\Users\path to your\SumatraPDF\sumatrapdf-settings.txt
		Name = Res&tore state
		Key = t
	]
]

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Undo (three cheers brilliant software) #5168

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Undo (three cheers brilliant software) #5168

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Shanj1991 Nov 9, 2025

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GitHubRulesOK Nov 10, 2025 Collaborator

Shanj1991
Nov 9, 2025

GitHubRulesOK
Nov 10, 2025
Collaborator