To add a single or multiple proxies, copy your proxy > hover over the Location column on your profile > click Paste proxies or Add proxy button > use the hot keys to paste the proxies.
To edit the proxy settings such as IP or password, go to the proxy manager > click the pencil icon on the proxy you need to change > click Save after making changes.
To delete a proxy, click on any proxy to open the Proxy Manager > right-click on the proxy you want to delete > click Delete proxy > confirm your choice.
You can copy or delete multiple proxies at a time. Just click anywhere on the Location column to enter the Proxy Manager > right-click on the proxy > Select proxy > keep selecting the proxies you want to act on > click Copy or Delete at the bottom of the Proxy Manager window.