Resize canvas while working

[meetdilip]

Today I was making a digital notice. The work I did took the whole scene because I was using a wallpaper as base/background. At one point, I could no longer add text inside the background/canvas and would happily wish for some extra space at top or bottom. I remember reading somewhere that we can resize canvas in GIMP. But I am not sure whether it is possible in 2.10.20 and while we are already working full canvas. Any help on this will be great.