The RTF Settings dialog

Selecting “Settings” from the context menu (or double-clicking the Block Text) brings up a dialog with settings for the Block Text. These are:
Font

Lets you select the font to use for the Block Text. If “No Change” is selected, the font in the original file (if applicable) is used.

Size

The text size, as a percentage.

Draw Frame

If this option is activated, a frame is shown around the Block Text.

Word wrap

If this option is activated, line breaks are used to fit the text in the Block Text symbol.

Replace mode

In this mode, the Block Text box is opaque, covering what’s under it.

Trans mode

In this mode, the Block Text box is transparent.