To edit a frame, click the border to select it, and then choose Format - Frame and Object - Properties. You can also resize or move a selected frame using special shortcut keys.
To delete a frame, click the border of the frame, and then press Delete.
If you see small red arrows at the beginning and the end of text in frame, use the arrow keys to scroll through the remaining text.
In the preview area of the Frame dialogue, the frame is represented by a green rectangle, and the reference area by a red rectangle.
You can also preview the effects when you change the frame anchor to "As Character". The "Baseline" is drawn in red, "Character" is the font height, and "line" is the height of the line, including the frame.