The Ruler.
ALT key.
Hold the Alt key
page layout
select page layout tabs & choose "margins".click "custom margins" to open the margins tab then in the small boxes (top,bottom,left,right and gutter)put in the measurment you need.
A word processing program like Microsoft Word or Google Docs is typically used to set tab stops, indent paragraphs, adjust column widths, and change page margins. These features are essential for formatting and customizing documents to meet specific layout requirements.
ruler
How to change default page margins in excel.
vertical ruler
The best way that I have found is to create a text box with no border in the margin, and type in it. Or are you talking about making comments in the margin? That would be done by using mark-ups.
To change the margins in a document, you can typically go to the "Page Layout" or "Layout" tab in your word processing software, such as Microsoft Word or Google Docs. From there, look for the "Margins" option, where you can select preset margin sizes or create custom margins according to your needs. Additionally, you can access this option by right-clicking on the page and selecting "Page Setup" or "Margins" from the context menu.
You can set the margins of the page on the page layout settings You can set the margins of the page by dragging the edge of the ruler at the top of the page (you must have the rulers visible for this and the position of the mouse pointer to perform this task is very delicate. The pointer turns into a double-headed arrow at the border between the page's white ruler and the margins grey ruler (at least those are the colors in the default Windows color scheme you can change all of these too). If you miss you might put a tab where you release the left mouse button or you might set up the left indent for the paragraph or you might do one or two other things, as I said the mouse pointer position is critical for this operation.