in order to enable Edit Mode, on your site, you only need to add the editmode variable to the URL and make it equal to 1 (To enable Edit Mode). So if your site is named mysite.com, adding the developer mode would look like this:
or if there is already an existing variable like mysite.com/?token=12312312 then you would simply concatenate the editmode variable with an ampersand (&) like this:
When the page loads with the Edit Mode variable, it will allow you to see what Widgets are used on the page apart from what parts of the page are created by said widgets. You can then look for the widgets on your Toolbox -> Widget Manager section in the backed to modify them if you need to.
So with Edit Mode, you can see which widgets are used on a page and edit them right away.