
Add a border to an object or sheet in Numbers on Mac
You can add a border, such as a picture frame or a dotted line, around an image, shape, text box or video, then modify the border’s thickness, colour and other attributes. You can also use a shape to create a border around a sheet.

Note: To add or change a border for a chart, see Add a border and background to a chart. To add or change a border for a table, see Change table gridlines and colours.
Add or change a border around an object
- Go to the Numbers app  on your Mac. on your Mac.
- Open a spreadsheet, then click an image, shape, text box or video to select it, or select multiple objects. 
- In the Format  sidebar, click the Style tab at the top of the sidebar. sidebar, click the Style tab at the top of the sidebar.
- Click the disclosure arrow next to Border, then click the pop-up menu and choose a type of border (line or picture frame). 
- Use the controls that appear to adjust the look of the border. 
Add a border around a sheet
To add a border, such as a solid or dotted line, around a sheet, you first add a square shape to the sheet, then change the shape’s attributes so it behaves like a border. For example, you change the size of the shape, give it no fill (as opposed to a colour fill) so that it doesn’t obscure other objects on the sheet, and so on.
- Go to the Numbers app  on your Mac. on your Mac.
- Open the spreadsheet you want to add a border to. 
- Click  in the toolbar, then select the square or rounded rectangle from the Basic category. in the toolbar, then select the square or rounded rectangle from the Basic category.
- Drag the white squares that appear around the shape until the outer edges of the shape form the border size you want. 
- In the Format  sidebar, click the Style tab at the top of the sidebar. sidebar, click the Style tab at the top of the sidebar.
- To remove the colour from the shape or choose a different colour, click the pop-up menu below Fill, then click No Fill or choose a different fill option. 
- Click the disclosure arrow next to Border, then click the pop-up menu and choose a type of border (line or picture frame). 
- To change the transparency, drag the Opacity slider. 
- To lock the border so it doesn’t get moved accidentally, click the Arrange tab at the top of the sidebar, then click Lock.