In some cases it can be desirable to have the background freeze while drawing the area to take the screenshot from. Examples can include things that are moving/animated, something that could (potentially) vanish while you're drawing the area (like a notification that only lasts for a couple of seconds), frames from videos, ...
If the background would freeze up when entering area select mode, you would get a view of the exact screenshot you're going to take while drawing the rectangle, and you could potentially take time to make the area a bit cleaner instead of having to very quickly draw something before it's too late.
Essentially, this takes a snapshot of what your screen looks like when pressing the hotkey (complete screenshot), displays that, and lets you select an area from that instead of from the live background.
Proposal
A setting in the app that can be toggled on/off, off by default so people that are used to the current system don't have to notice the change.
Problem
In some cases it can be desirable to have the background freeze while drawing the area to take the screenshot from. Examples can include things that are moving/animated, something that could (potentially) vanish while you're drawing the area (like a notification that only lasts for a couple of seconds), frames from videos, ...
If the background would freeze up when entering area select mode, you would get a view of the exact screenshot you're going to take while drawing the rectangle, and you could potentially take time to make the area a bit cleaner instead of having to very quickly draw something before it's too late.
Essentially, this takes a snapshot of what your screen looks like when pressing the hotkey (complete screenshot), displays that, and lets you select an area from that instead of from the live background.
Proposal
A setting in the app that can be toggled on/off, off by default so people that are used to the current system don't have to notice the change.
Prior Art (Optional)
win + shift + s)