Word Processor programs use ruler bars to show you how much space you need to have to do what you want. Computer Aided Design programs use ruler bars to give you the dimensions of the drawing you are working on
Ruler
There is no ruler bar in MS Excel. That is an MS Word function.
With a ruler.
Stright edge
use the ruler as a simple balance and put an iron bar at each end. if they are the same, the ruler will not tilt and the heavier bar must be the third one. If they are different, then the heavier bar is the one that tilts the ruler down.
chart with bars
A ruler bar allows you to format the vertical alignment of text in a document.
the view ruler is located at the top of the vertical scrool bar.
View
A bar scale is like a ruler or measuring tape. It can measure long distances.
Define better.
A ruler bar is a tool used in graphic design and desktop publishing software to measure and align objects on a page. It typically appears as a horizontal or vertical strip with markings for units of measurement. Users can drag it from the edge of the software window to measure distances accurately.