Can you share some screenshots of editor's control panels?
The following screenshot is for Editorial Manager (used by Springer, Nature, APA, Wiley, Taylor &amp; Francis, PLOS).



The action links on the left are where everything is done. Brief explanation of some of the tabs:


iThenticate is a program that checks for plagiarism. This particular submission has 16% similarity, which is low. If desired the editor can read the entire report, which includes both where the similarity occurs and where it came from. 
"Duplicate submission" checks if the manuscript was submitted multiple times. Sometimes it's in error (author submits twice thinking the first time didn't go through); other times it flags a reject-and-resubmit manuscript.
"History" shows the history of the manuscript from submission till today, such as when it was submitted, when an editor was assigned, when each reviewer was invited, and so on. Every time the system sends an email, it's logged here.
"Edit submission" lets the editor modify the submission (e.g. if the authors later discovered they've not included a source file, this is where to add it).
"Invite reviewers" - self-explanatory. Clicking this goes to another menu that lets the editor both mine the current database and / or register new reviewers to invite. If this submission had a completed review there'd be a "view reviews and comments" button, and if it's ready for a decision, there'd be a "submit editor's decision and comments" button as well. 
"Set final disposition" terminates the peer-review process. For this manuscript, since no decision has been made yet, the only option is 'withdraw'. If a decision has already been made (accept / reject), this is also where to set the final status.


The other boxes should hopefully be self-explanatory. In the review status on the right, the first manuscript currently has 3 reviewers who've agreed to do it, 1 who hasn't responded, and 3 who declined. Clicking the "more" button lets the editor see who those reviewers are, when the reviews are due, how long it's been since the reviewer invitation was sent out (for the reviewer who hasn't responded), and the reasons for declining, if any. 

The bottom manuscript is showing status "required reviews completed" because the settings for this particular journal is set to flag any submission with 1 completed review as such. Some journals might require two or more reviews before the status updates.