The size of all Viewers (except for the Video Viewer) can be increased and decreased relative to the size of other Viewers. Do one of the following:
Use the up/down-arrows of the split-pane.
Click on the up/down-arrow to increase/decrease the size of the corresponding Viewer.
Use the mouse.
Go with the mouse to the split-pane. The mouse will turn into a double-headed arrow. Click and move it up/down to increase/decrease the size of the corresponding Viewer.