Boxing a few rows in a table to flag for double-checking, circling a detail in an image, marking a block on the page as "needs a redesign" — a clean rectangle border communicates these more clearly than a highlight or a freehand mark would.
Steps
- Open LocalPDF and load your PDF.
- Click the "Rectangle" tool in the top toolbar.
- Click and hold on the page, drag from one corner of the area to the opposite corner, then release to complete the box.
- Adjust border color (the swatch) and line thickness (the number input) from the top toolbar — either before drawing, or by reselecting an existing rectangle.
- Click "Download" when you're done.
Rectangle vs. Highlight vs. Draw: which to use
- Rectangle: best for framing a clearly bounded area with crisp edges that don't obscure the content inside (a rectangle is just a border by default, transparent inside).
- Highlight: best for coloring text itself for emphasis, layering semi-transparently right on top of it.
- Draw: best for irregular shapes — arrows, circling something loosely, handwritten notes.
Adjusting a rectangle after drawing it
Click an existing rectangle's border to select it, then drag to reposition, drag a corner to resize, or click delete to remove it. Since the inside is transparent by default, it doesn't obscure the original content underneath — good for "pointing at a range" without interfering with reading.
Try using the Rectangle tool to frame an area that needs attention.
Open LocalPDF →