1. Backup my toolrc so I don't have to create it again.
   
2. Delete the C:\Users\User_Name\AppData\Roaming\GIMP\3.0 folder.
   
3. Open GIMP and have it create a new GIMP 3.0 folder structure and then close GIMP.  It appears to copy some preferences and settings from 2.10.38 but not all.
   
4. Create a default_rc folder and copy all rc files into it just to be safe.
   
5. Copy my toolrc back into C:\Users\User_Name\AppData\Roaming\GIMP\3.0.
   
6. Open GIMP and if it opens with the correct window size then:
   
7. Fix the docked tab options, default grid spacing, default export file type and other preferences that did not copy over from 2.10.38.
   
8. Adjust the canvas window size to fit a landscape oriented photo and adjust the docked window sizes.
   
9. Edit > Preferences > Interface > Windows Management > Save window positions on exit = uncheck, click on Save Window Positions Now.
   
10.  Close GIMP.
    

(07-01-2025, 11:47 PM)SteveH Wrote: After installing GIMP 3.04 on Windows 11 Home 24H2 26100.4351, GIMP opens with the GIMP window extending below the taskbar and/or extending above the top of the screen. Also, when using View > Zoom > Fit Image in Window, the GIMP window changes to extending below the taskbar.  Apparently there is a bug in Edit > Preferences > Interface > Windows Management > Save windows position on exit.

This is on 2 computers. Others have reported the bug: https://gitlab.gnome.org/GNOME/gimp/-/issues/14325

My solution with 2.10.38 already installed

1. Backup my toolrc so I don't have to create it again.
   
2. Delete the C:\Users\User_Name\AppData\Roaming\GIMP\3.0 folder.
   
3. Open GIMP and have it create a new GIMP 3.0 folder structure and then close GIMP.  It appears to copy some preferences and settings from 2.10.38 but not all.
   
4. Create a default_rc folder and copy all rc files into it just to be safe.
   
5. Copy my toolrc back into C:\Users\User_Name\AppData\Roaming\GIMP\3.0.
   
6. Open GIMP and if it opens with the correct window size then:
   
7. Fix the docked tab options, default grid spacing, default export file type and other preferences that did not copy over from 2.10.38.
   
8. Adjust the canvas window size to fit a landscape oriented photo and adjust the docked window sizes.
   
9. Edit > Preferences > Interface > Windows Management > Save window positions on exit = uncheck, click on Save Window Positions Now.
   
10.  Close GIMP.
    

This appears to fix the problem as the next day, GIMP opened with everything positioned correctly on both computers. I hope that this helps.

(07-03-2025, 10:22 AM)rich2005 Wrote: Just as a note:
First run of Gimp, when there is no  Gimp 3 User profile (as with a new install) does try and migrate settings from a previous version.  There is a bug report here about Gimp 2.10 / 3.0.4  Not really about window size but that might come into it.

https://github.com/GNOME/gimp/commit/204ddaae56ffdd2425571455629709a47fe4a800

Always better to disable your old Gimp User profile - rename or move to another folder for a new Gimp 3 install.

(07-03-2025, 09:22 PM)SteveH Wrote: So you are saying that it is best not to have both 2.10.38 and 3.04 installed? My thoughts were to have both installed, so in the case of annoying bugs in 3.04, I could revert back to 2.10.38. Note that in 2.10.38 where Edit > Preferences > Interface > Windows Management > Save window positions on exit = check, this did not result in the GIMP window extending below the taskbar. But then there was only one GIMP install.  

(Yesterday, 07:46 AM)rich2005 Wrote:

(07-03-2025, 09:22 PM)SteveH Wrote: So you are saying that it is best not to have both 2.10.38 and 3.04 installed? My thoughts were to have both installed, so in the case of annoying bugs in 3.04, I could revert back to 2.10.38. Note that in 2.10.38 where Edit > Preferences > Interface > Windows Management > Save window positions on exit = check, this did not result in the GIMP window extending below the taskbar. But then there was only one GIMP install.  

No, for Windows you can easily have both Gimp 2.10 and Gimp 3.0

Even if you un-install Gimp 2.10 the User profile remains and this is what migrates to Gimp 3.0

So the folder to disable / delete  is C:\Users\"yourname"\AppData\Roaming\GIMP\2.10

Saving settings: You should be able to fix the way Gimp starts up, a little more than you have already done, go through the 3 sections Tool Options / Window Management / Input Devices - uncheck the save on exit / click on "Save xxxx Now" for each.

Of course there might be other Windows 11 factors involved, all those terrible snapping options maybe,  but for Gimp all the settings are held in the file sessionrc in your User profile. It is a text file, attached is one from a Win11 (VM) compare it with your version.

You are not getting very far here so time to file a bug report to the devs. https://gitlab.gnome.org/GNOME/gimp/-/issues

(Yesterday, 08:27 PM)SteveH Wrote: In my original post, 9. Edit > Preferences > Interface > Windows Management > Save window positions on exit = uncheck, click on Save Window Positions Now.