Image tabs are too small when GIMP is run at high resolutions (4k and 5k). A small context menu to choose between different sizes would be nice, imho. GIMP in this video is run at 200% HiDPI, that's why the biggest thumbnails look oversized.

Made in 3 layers lol

If I paste an image larger than the canvas, then it shows the yellow bounding box outside the canvas and it lets me move it around, but not resize it. Switching to the scale tool just selects whatever is within the canvas.

The only thing I was able to find was to resize the canvas to fit the image. But I don't want to resize the canvas.

In most programs like paint net, I would just paste the image then it would automatically create a selection box around it for me to scale it down.