Feel something off? Here's how to spot it
Can't select both at once. Just one at a time, I'm afraid. BUT, if you hold L (or R if you use left-handed mode) when you paste something, you can move it one pixel at a time with the arrow buttons, to make sure it lines up, before pasting.
Animations
Can't select both at once. Just one at a time, I'm afraid. BUT, if you hold L (or R if you use left-handed mode) when you paste something, you can move it one pixel at a time with the arrow buttons, to make sure it lines up, before pasting.