How to Create External Templates for Google Slides
Unlike working with Google Docs and Google Sheets, you cannot simply copy and paste the contents of a locally-created customized presentation into a Google Slides file. Instead, upload them in the supported .odp format. With a bit of work, you can use customized templates created with LibreOffice or MS Office. Because you cannot add new templates to the Slides Template Gallery, you first need to create a new folder that will house the customized templates. To create a locally-created customized template, do the following:
How to Use Your Custom Templates
Now that you’ve created and uploaded your new template, you can’t just open it and start adding content. If you do that, the template is no longer a template, but regular presentation file. Instead, do the following:
How to Create a Template From a Google Slides Template
If you don’t have software like LibreOffice to make your own custom templates, you’re not out of luck. Instead, you can modify one of the free templates in the Slides Template Gallery
