Please save (create) PPT file from another PPT file. If there is a bullet lists with the ‘Increase List Level’ + customized indent, the output in PPT (file TextFrameLevelNew.ppt) seems to remove the indent completely.
In a attached sample:
Test1 is using button ‘Increase List Level’;
Tesrt2 is using manual indentation 1.3 cm in Paragraph dialog.
I have observed the issue shared by you and suggest you to please try using Aspose.Slides for .NET 7.0.0 on your end. If there is still an issue then please share the feedback with us.
I have worked with the presentation file shared by you and have been able to observe the issue specified. Actually, the paragraph indentation gets changed on saving presentation and an issue with ID SLIDESNET-33960 has been created to further investigate and resolve the issue.
For the time being, I have shared the following work around code that you can use on your end for your investigation.
I regret to share that the issue shared has not yet been resolved. I have requested our development team to schedule the issue for investigation and resolution. I will share the updates with you as soon as it will be resolved.