There are two ways to compress theme images:
- Using a plugin, such as ShortPixel. A setting exists to include custom folders, and we can tell that to scan your theme.
- Manually, using ImageOptin. We do this by downloading your images, compressing them, then re-uploading them.
Both options have the same outcome. We typically do the second one, since it’s straightforward and quick, and you don’t need to have any image credits through your compression plugin. If you’re DIY-ing it, the former may be easier.