Fit to visible area on canvas
The Fit to Visible canvas option adjusts the canvas size to the visible content on the canvas.
Fit the canvas size to the visible content:
For best results, click and drag the clip(s) on the canvas to center your content within the canvas.
Select Edit > Adjust Canvas or click the canvas scale dropdown and select Adjust Canvas.
The Canvas controls appear under the canvas. Camtasia dims the entire application except for the canvas area. Select the Fit to Visible option from the preset dropdown.
Click Apply.