Configuration - Width

 
Width

SharePoint Planner estimates the desired size based on the Web Part Zone (header, column etc) that you place it in, based on the most common screen resolutions.

You can specify the exact size under the Appearance section of the tool part by specifying Fixed Width and setting a value in pixels.

Category Width

By default the Category column (if shown) takes up 15% of the total width, but this can be set to an exact width in pixels using the Category Width option under the Planner Appearance section of the tool part.