Use table styles in Keynote on Mac
The easiest way to change the look of a table is to apply a different table style to it, which you can do at any time.
If you customise the look of a table and want to apply the same formatting to other tables, you can create a new table style. The new style is saved along with the styles that come with the theme.
Keynote determines how to create the table style based on the most frequently used style for some attributes, such as cell fill and border style. For example, if your table uses many different fonts, the new table style adopts the font that appears the most often in the table.
Apply a different style to a table
Go to the Keynote app
on your Mac.Open a presentation with a table, then click the table.
In the Format
sidebar, click the Table tab.Select a different style from the options at the top of the sidebar.
Click the arrows on the left
and right 
if there are more available styles.
If you made changes to your table’s look before applying a different table style, the new table style retains those changes. To override those changes when you apply a new style, Control-click the new table style, then choose Clear Overrides and Apply Style.
Revert changes to a table style
If you made changes to a table’s look — for example, by changing the border of table cells — you can revert the changes by reapplying the original table style.
Go to the Keynote app
on your Mac.Open a presentation with a table, then click the table.
In the Format
sidebar, click the Table tab.Control-click the table style you want to reapply and choose Clear Overrides and Apply Style.
Save a table as a new style
If you made changes to a table’s look and want to save these changes, you can create a new table style that you can use again later. You can’t add new table styles in a presentation shared with others.
Go to the Keynote app
on your Mac.Open a presentation with a table, then click the table with the formatting you want to save as a new style.
In the Format
sidebar, click the Table tab.Click the arrow to the right of the table styles to navigate to the last group of styles, then click
to add your style.
The new table style is added to the table styles at the top of the sidebar. You can drag styles to organise them however you like.
Create a table style that uses the colours in an image
You can create a table style that matches the colours of a particular image. This can be helpful when you want to make a visual connection between the data in the table and the subject of the image.
The new style has a table title, a header row, a column and a footer row — all of which match colours from the image. When you apply the new style to a selected table, it imparts the colours to these features in the table (if the table has them).
Go to the Keynote app
on your Mac.In a presentation, click any table or click
in the toolbar and add a table.In the Format
sidebar, click the Table tab.Navigate to an image anywhere on your computer.
To browse your photos, click
in the toolbar.Drag the image to the table styles in the sidebar.
Alternatively, you can Control-click a table style in the sidebar, select Create Style from Image from the shortcut menu, then browse for an image.
A new table style with colours from the image is added to the table styles at the top of the sidebar; it doesn’t replace the style you Control-clicked to open the pop-up menu.
To apply the new style to the selected table, click the style in the sidebar — it isn’t applied automatically when you create it.
Redefine a table style
To quickly change the look of all tables that use the same style, you can redefine the style.
Go to the Keynote app
on your Mac.Open a presentation with a table, select a table that uses the style you want to update, then modify its appearance so that it looks the way you want.
Click the table you just modified (if it’s no longer selected).
In the Format
sidebar, click the Table tab.At the top of the sidebar, Control-click the style you want to redefine, then select Redefine Style from Selection.
Select one of the following:
Update all objects that use the current style: This changes the look of all tables that currently use this style.
Don’t update objects and disconnect them from the style: This changes only the selected table. The style for the tables that aren’t updated is removed from the Style tab because the style was replaced.
Click OK.
The style is updated in the sidebar and all tables that use the style are updated.
Organise table styles
You can rearrange the table styles in the sidebar for easier access to the ones that you use most often.
Go to the Keynote app
on your Mac.Open a presentation with a table, then click any table.
In the Format
sidebar, click the Table tab.Click and hold the style you want to move, then drag the style to a new location.
If you have multiple style panes and want to move a style from one pane to another, drag it over the left arrow
or right arrow to open the other pane.
Delete a table style
Go to the Keynote app
on your Mac.Open a presentation with a table, then click any table on a slide.
In the Format
sidebar, click the Table tab.Control-click the style you want to delete, then select Delete Style.