Another impressive effect that has made its way into consumer-level video editing software is motion tracking, which lets you attach an object or effect to something moving in your video. You might use it to put a blur over the face of someone you don't want to show up in your video. You specify the target face, and the app takes care of the rest, tracking the face and moving the effect to follow it. This used to be the sole province of special effects software such as Adobe After Effects. Corel VideoStudio was the first of the consumer products to include motion tracking, and it still leads the pack in the depth and usability of its motion-tracking tool, though several others now include the capability.
Another feature that's new to me coming from a T3i that I love is the grid that you can have showing in the view-finder. Before you had to buy a replacement viewfinder eye-piece to get a grid and they didn't offer one for the T3i. Now it's done digitally and it's awesome. My only gripe is that you can't actually customize what grid pattern you want. But it's definitely a step in the right direction.
The T#i line is what they call a "pro-sumer" line, which is basically between a consumer line camera like a very basic DSLR and a professional DSLR camera, thus the term "pro-sumer." Typically what this meant is an DSLR with an APS-C sized sensor, decent resolution, and some hand-me-down professional features of pro-grade cameras from a few years ago. For this reason, sometimes it's not worth upgrading from one of these cameras to the next until at least a few generations have past (meaning if you have a T5i, it's not really a giant leap forward to upgrade to a T6i). However, the T7i is somewhat different. When I was doing research on what features it has and what it is missing compared to the pro-grade DSLRs that are considered "current" right now, I was surprised to find very little. The main differences really is that the pro-grade cameras have the LCD display on the top that would display all of your relevant camera settings, and then a few of them would also sport a full-frame sensor. Other than that, the differences are very minor. Something like maybe 1 or 2 frames less in burst mode or something like that. Nothing that would really jump out at you and make you regret not stepping up to the professional grade equivalent (Think it would be the 77D?). It actually has pretty much all of the big features of even their current pro-grade DSLRs, making the T7i probably one of the best prosumer DSLRs to buy. 
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