How do I resize the chart to avoid legend overlap?

FNC TMS FNC Chart
1

Is it possible to automatically resize the chart when the user changes the form size to prevent the legend from overlapping parts of the chart?

Below is an example of what is happening:

Initial form:

Screen_1
Screen_1876×573 38.5 KB

The user reduced the form size, and the legend overlapped part of the chart:

Screen_2
Screen_2643×566 32.2 KB

How can the chart be automatically scaled pie chart down to avoid this?

2

Yes. Enable automatic sizing for the pie and reserve space on the right for the legend:

with TMSFNCChart1 do
begin
  SeriesMargins.Right := 260;
  Series[0].Pie.AutoSize := True;
  Series[0].Legend.Position := lpCenterRight;
end;

SeriesMargins.Right prevents the pie from being drawn underneath the legend. With Pie.AutoSize enabled, the pie is automatically recalculated when the form or chart is resized.

Adjust 260 according to the width of your legend. No OnResize event is required.