The Text Rollup tool (symbolized by a thumbtack) allows you to attach a note to an image. Unlike a normal text box, its background is opaque and colored. Click to draw the box as you would for a normal text box. The Rollup can be either expanded, which displays the entire box, or not expanded, which decreases the box to one line of text, by clicking on it while viewing.
The Text tab in the Text Rollup properties dialog allows you to set the text contents of the box, along with color and alignment options.
The Pen tab in the Text Rollup properties dialog allows you to set options for the width, color, and style of that box.
The Brush tab in the Text Rollup properties dialog allows you to set the type and color of the brush that will fill in that shape.
The Font tab in the Text Rollup properties dialog allows you to set the font for that box.