Frames.
Frames are intended to be transparent boxes with a title that can be placed around part of the worksheet to highlight that area. Because the format of the border of these widgets cannot be altered, they are less visible than they could be. A similar frame, without the title, can be made with the rectangle drawing element, which is presented in Section 9.4.3 ― Drawing Rectangles..
9.3.2.1. Configuring the properties of the checkbox
The properties of the frame can be altered with the menu item in the context menu which appears when the mouse cursor is placed over the frame and one of the secondary mouse buttons is pressed.
Currently, only the word that appears in the frame can be altered.
The word displayed in the frame can be altered by typing new text in the textbox next to the word "Label".