Can't make straight lines after a curved line when masking

[soft beans]

Whenever I am masking and curve the mask by clicking, holding, then dragging, I can't make a straight line after that point. After the curved line, I click to make another point and it becomes curved automatically. How do I fix this?? I want it to be straight after. 

[angie_taylor]

Switch off the "Rotobezier" option in the Toolbar before you begin drawing your mask.

[soft beans]

It's off but it doesn't work. It's still curved. 

[Rick Gerard]

Select the mask path in the timeline. Go to the Layer/Masks and Shape Paths menu and uncheck Rotobezier.

If you have the pen tool selected (g) you can hold down the Alt/Option key to change the pen to the convert vertex tool to collapse (make straight) or expand and move the Bezier handles (adjust the curves). The Ctrl/Cmnd key with change the pen tool to the open selection or solid selection tool to help you select points (vertices) and groups of points. This makes editing paths easier. If the Path is selected in the timeline the selection tool (v) also works well to edit paths, but if a path is not selected in the timeline editing paths with the selection tool is difficult if not impossible.