Hi, I am using the spreadsheet editor and importing a few google slides presentation that I used before. They have their own slide themes which are more or less correctly displayed in the OnlyOffice editor. The editor also recognize that they are a modified theme and I can see it at the end of the Theme selection page.
My problem is that there is no simple way (that I know of) of saving this theme for later, even though it appears in the editor. I have to duplicate the same imported presentation every time to keep this theme instead.
A simple “save as new theme button” would help greatly.
At the moment, the Presentation Editor does not provide a UI option to save an imported or modified presentation theme as a reusable custom theme, such as a “Save as new theme” button. The imported theme remains available within the presentation file, so duplicating the source presentation or using it as a template is currently the practical workaround.
You can create new presentations based on a prepared template via File → Create from template.
Similar feature requests regarding creating and saving custom presentation themes have already been registered. We have added your feedback and use case to the existing requests. We will update this thread once this functionality is implemented or if there are any related updates.