Instruction and logo disappears when cursor over it, so as not to interfere with capturing area.

Ultraprecise aiming while holding the SHIFT button.

The most used buttons (upload, download, copy to clipboard) right under the cursor anywhere on the screen.

Line thickness and desired color is set only once or rarely.

Therefore these two buttons combined into a single.

 

Visual choice of line width instead of the plus and minus buttons.

Screenshot size buttons displayed only when the cursor is inside the area or near the borders.

Required area can be set to exact pixel.