Select Full Screen to record large applications or all activity on your computer desktop.
2. Click the Full Screen button.
Select Custom dimensions to record a specific size requirement. You can record a window, application, or an area on the screen.
2. Click the Custom button. The custom options expand.
Enter custom dimensions (in pixels) into the Width and Height fields. To maintain the aspect ratio, click the lock icon.
Click the Select button to open the selection tool. To select a region, click and drag with the mouse. To select a window, move your cursor over the desired window and click the left-mouse button when a green border appears around the window.