Add or modify a chart in Keynote on Apple Vision Pro
When you create a chart in Keynote on Apple Vision Pro, you type chart data in the Chart Data editor (not in the chart itself). If you later make changes in the Chart Data editor, the chart updates automatically.
You can modify a chart’s data references (numbers, dates, or durations) at any time. You can add and remove an entire data series, or edit a data series by adding or deleting specific data from it.
Add a chart
Tap
You can tap 2D or 3D to see the types of charts you can add, then swipe left or right to see more options for each type of chart.
When you add a 3D chart, you see
To add data, tap
Enter data: Tap placeholder text, then enter your own data.
Change whether rows or columns are plotted as a data series: Tap
If you added an interactive chart, to change the type of control used for interacting with the chart, tap the chart, tap
Add a Magic Chart effect to an interactive chart
You can animate the different data series in a chart with a Magic Chart build effect.
Tap the interactive chart, tap
Tap Magic Chart at the bottom of the window.
Tap Start, then tap an option:
On Tap: The Magic Chart effect plays when you tap the slide during the presentation.
After Transition: The Magic Chart effect plays when the slide opens during the presentation.
To see a preview of the animation, tap
Add or delete a data series
Tap the chart, tap
Do any of the following:
Add a data series: Tap cells, then enter the data for your new data series.
Remove a data series: Tap the bar for the row or column you want to delete, tap it again, then tap Delete.
Reorder data series: Pinch and drag the bar for the data series you want to move.
Tap
Switch rows and columns as data series
When you add a chart, Keynote defines the default data series for it. In most cases, if a table is square or if it’s wider than it is tall, the table rows are the default series. Otherwise, the columns are the default series. You can change whether rows or columns are the data series.
Tap the chart, tap
Tap
Tap Done to return to the chart.
Share the x-axis for multiple values along the y-axis for scatter and bubble charts
Sharing the x-axis means plotting a single kind of value along the x-axis, while allowing for multiple kinds of values plotted along the y-axis. By default, the x-axis values are shared among multiple sets of y-axis values in some types of charts.
Tap the chart to select it, tap
Tap
Tap Done to return to the chart.
About chart downsampling
If a column, bar, line, or area chart references a table with a large number of data points, the chart automatically shows a representative sample of each series to improve the performance of Keynote. Downsampling doesn’t change or remove the data in your table, and only changes the visible data points in the chart.
If your chart data is being downsampled, a message appears when you tap 
If you want to see certain data points in your chart, you need to create the chart from a smaller table or a smaller selection of data from a large table.