You can use the pencil tool to draw in an outline, then use the red pen to draw in the lines. Once you have the outline, move the mouse over to your text and click on the red pen icon. When you click on a red pencil icon, it lets you draw.› You can make changes to the PDF document through this browser window.› How To Change Color Of Brush In Preview? — Google Aug 9, 2024 — “If you want to be able to change the color of a tool, right-click on the tool in the toolbar, and choose a new color for that tool.”‹ Click on the black object to make it transparent.