I have a windows keyboard, no cmd button
Shift + CMd + 3
Shift + CMd + 4 for selection mode, (space to toggle to window mode)
Images will be saved on your desktop.
Its ⌘ not cmd![]()
There is also the included Grab utility that you can use if you want.
I used to use Grab, which spits out TIFFs.There is also the included Grab utility that you can use if you want.