After hitting the "capture" button, the custom drag area lags and stutters. I've used SnagIt since it came out, and it's a good program, but it always has these kinds of bugs that keep it from being a GREAT program.
I remember the first version of snagit I used. It was a lightweight program and it worked perfectly. But this latest reincarnation is riddled with bugs. Just having the editor running in the background will cause your mouse cursor to glitch all over the screen, unplugging the mouse didn't help, a new mouse didn't help. It took me weeks to figure out it was due to Snagit. Imagine the frustration I went through trying to work with a glitchy mouse, I was about to take the laptop in for a surface because I thought my trackpad was bad. But then I remembered, it all started happening after I installed the latest version of Snagit. Killed the process in Task Manager and problem solved. Long story short. Snagit is now a big disappointment.