Customizing Nuke with Gizmos - Nuke 101: Professional Compositing and Visual Effects - page 508

Use this Text node to write the size of the Action Safe area. To begin, place the
text so that it's placed at the bottom left corner of the Action Safe area and auto-
matically moves with it. The Text node places the text inside a box, and you will
need to place the left and bottom sides ofthis boxwhere the left and bottom sides
of the Action Safe area are.
2. At the bottom of Text1's Properties panel, open the Transform group by clicking
the triangular arrow to the left of that name ( FIGURE 12.22 ) .
Figure 12.22. Open the Transform group using this triangular arrow.
3. Click inside the box.x property's Input field and press = (equals key).
This is the hot key for loading the Edit Expression panel. It only loads the Edit
Expression panel for this specific part of the Box property, not all four parts.
4. Enter Rectangle1.area.x and click OK ( FIGURE 12.23 ) .
Figure 12.23. A simple linking expression.
This places the left side of the box at the left side of the safe area.
5. Click inside the box.y property's Input field and press =.
This loads the Edit Expression panel for the second part of the Box property.
6. Type Rectangle1.area.y and click OK.