Hello,

in Test Project I have a Chart with several LineSeries and one AreaSeries. AutoScaleAxisTransform in each Axis is used. I noticed some unexplainable behavior:
- in fig_A you can see Chart in "all is OK" state,

  - if I do Chart1LineSeries1.Active:=FALSE (this series is tied to Axis #0) then all Axes suddenly expands (see attached fig_B),
  - if I do Chart.Axis#0.Range.UseMin/Max:=FALSE then all Axes scales to expected range (see attached fig_C).

Attached Test Project.

Is this a Bug?

This is hard to tell from the description alone, there are so many possibilities... You should create a litte project which shows the issue and attach it (please include only source files, .pas, .lfm, .lpi, .lpi, no .exe, .ppu).

2019-01-06 19:56, Werner Pamler via lazarus rašė:

Am 06.01.2019 um 18:00 schrieb Valdas Jankūnas via lazarus: This is hard to tell from the description alone, there are so many possibilities... You should create a litte project which shows the issue and attach it (please include only source files, .pas, .lfm, .lpi, .lpi, no .exe, .ppu).

I attached in my first mail.

Valdas Jankūnas wrote

I attached in my first mail.

Sorry. When I scrolled down I only saw the screenshots.

Yes, this looks strange, and it could be a bug - I'll have to investigate. In the meantime you can work around by releasing the Range lock of the axis of the series that you want to deactivate:

procedure TForm1.CheckBox1Change(Sender: TObject);
begin
    Chart1LineSeries1.Active := Checkbox1.Checked;
    Chart1.AxisList[Chart1LineSeries1.AxisIndexY].Range.UseMin :=
Checkbox1.Checked;
    Chart1.AxisList[Chart1LineSeries1.AxisIndexY].Range.UseMax :=
Checkbox1.Checked;
end;