Hey, when I try to move or change the dimensions of a video for example, the dimensions change with the canva configuration. I touch the botton middle dot to reduce, this reduces all and not the part I want to reduce. I have Camtasia 2019.
More about best practices. In the unlikely event you want to "distort" dimensions (I strongly recommend against), use Shift-drag instead. Why do I recommend against it? Many new operators want to distort the dimensions of the original recording so it will fit a certain size player window, thinking the viewer won't notice, for example, that the protagonist has lost or gained 50 pounds. Believe me, viewers notice. And it makes your footage look amateur.
Next question might be, OK, then why do most video NLEs permit distortion? The exception is when you have a video clip that does not contain something that has recognizable dimension (a rocky landscape, say) and you want to make some changes for dramatic effect, you will want that type of control.
Tomas, your footage, for example, contains a road scene with vehicles. traffic lights, a guy running. Distorting the dimensions would create an unrealistic effect because viewers would recognize it was intentionally distorted.