Avoid large media files so pages will load quickly. Upload the file with the pixel dimensions you want to use on the page. WordPress will make a 150 px max size thumbnail and a 300 px max size ‘medium’ available to you.
Likewise, ‘optimize’ PDFs for quick downloading.
Plugin used to organize media: ‘Enhanced Media Library’.
Managing categories is done by clicking Media/Media Categories on the dashboard. You can add categories and give them a ‘parent’ if they are part of a hierarchy. You can edit categories to rename them.
In the media library you can filter on a parent or child category. You can look for images without a category.
Logos and Symbols