One chart surface for every shape of the numbers. The chart type decides how the data is drawn; the data itself can be edited in a sheet beside the chart.
Chart types
Data view
Open the tab's 3-dot menu and switch on Data view. The chart's rows open in a Sheets tab beside it, in split view. Edit cells there and the chart redraws with the new values; the sheet and the binding are saved with the task, so the pair comes back after a reload. Switch it off to close the sheet again — the rows stay in the chart. For line, bar and area charts the same menu offers a Chart type picker.
A chart added from the "+" before the tabs opens with its Data view already on, so there is somewhere to type the numbers.
Properties
These are the fields this surface accepts. They matter when you build one through the API; the work sets them for you otherwise. Only the fields of the chosen chart type apply.
What you can do
When this is chosen
The work picks the surface that fits what it produced — you do not have to ask for Charts by name. Charts now covers what used to be separate Plots, Graphs, Trends, Funnels, Donut charts, Lifecycles and Quadrants; older tasks built on those keep rendering as they were. If it picked the wrong one, you can move the result to a different surface from the interface menu.