Layer and toolbox window doesn't appear when I reopen GIMP after closing it using the launcher

If I close GIMP with the x on its window, everything works fine.

But most of the time I have so many images open that I do not want to close each individually. In this case, I go to the Ubuntu sidebar, right-click on the GIMP icon and click quit

If I do this, all images are closed, but unfortunately when I start GIMP again, the layer and toolbox window are closed and I have to reopen them (Windows->Recently Closed Docks -> Layers and Windows->Recently Closed Docks -> Toolbox).

Is it possible to tell GIMP not to close the layer and toolbox window each time I quit it?

Solution 1:

Yes. Use single-window mode:

GIMP 2.8 introduces an optional single-window mode. You can toggle between the default multi-window mode and the new single-window mode through the Single-window mode checkbox in the Windows menu. In single-window mode, GIMP will put dockable dialogs and images in a single, tabbed image window. The single-window mode setting is of course preserved if you quit and start GIMP again. Single-window mode removes the necessity for users of having to deal with multiple windows.

https://www.gimp.org/release-notes/gimp-2.8.html