Yes and no. Fortunately, your iMac comes with Accessibility in the System Preferences. Look for "Display", you can try these features which works for you. (For iMac OS 11.10.5)

Just remember where you clicked the check on the box after it changed the background like Invert color because I got lost and unable to find the box. Now, I found it back to normal.

Actually, I prefer to use another way to make the screen bigger by using my keyboard and mouse. On keyboard, hold "Control" button and roll your finger (up and down) on your Magic mouse. You move around with your mouse for the arrow on the screen. Play with it. I believe that is what you are looking as for your preference choice.

I do not like the "Option" button (and mouse) because it is too fast and too confusing to me so please do not use the option button. Okay.

Another issue, very unfortunately, Opera does not have a good color background extension. FireFox is the best color background for the extension which is called, "DarkenBackground." You will love it. I hate the white background that makes my eyes stress.

It keeps showing up another two pages after I pressed the + button a few times. It's two different junk ads - one is for Apple Tech Support page, and another one is "Brand New Cadillac Coupes And Sedans Are So Cheap It's Not Even Funny." Why is your Opera browser to do that to me? That's awful. Your Opera Beta is not working properly.

My Opera browser does not have a change size font feature for two icons on the menu such as + (big size) and - (small size). So, I use my keyboard to press the buttons for + and - .

I discovered a dangerous problem. On your Opera news articles, I pressed the button twice so that I could read big letters (sometimes). It suddenly goes to a new webpage, unexpectedly, an Apple Tech support webpage OR even a malware webpage (Opera showed me the warning for malware so I closed that window immediately). This is NOT the first time that happened to me.

It is definitely something wrong with your Opera browser (v.38) and Opera news because it looked like that a hacker successfully implanted your program that your team failed to test it first. No, it is not okay for me to deal with this problem. You can test it yourself on your iMac to see what happen.

I was surfing on Opera News and selected some links to be opened for me to read the articles. Then, I changed the fonts bigger by using the shortcut on the keyboard: press two buttons: command and plus (or subtract for smaller fonts). This is nice. Unfortunately, this Opera does not have the +/- icons on the browser for a long time.

Somehow, my mistake with a wrong button: I pressed the control or option and plus button that automatically went to Apple Care chat online (webpage) or sometimes goes to an advertisement webpage. This is not supposed that way. I wonder that it could be a hacker's program for its link on Opera News articles.

The command button (on keyboard) and roll with your finger on the mouse is too confusing and too fast to find the right size.

This is better: command and +/- buttons (without using mouse) are the easy and faster way for the font sizes -- as long as you should not press control or option button.

I would think that it is the best way for you to delete the Opera app and re install it so that it will clear up the mess. IF you are looking for a download video downloader on Opera's extensions. Then it is at: https://addons.opera.com/en/search/?query=download+video&type=extensions

Off subject, I use the CleanMyMac app to clean it up.

Make sure that your OSX (App Store/Updates) is updated first and then update for all browsers that you have on your computer (or iMac).

Where is the closed caption video downloader for the extension?

I am not interested in making the closed captions. Just the video clip that contains captions so that I would download it onto my iMac.

Another question, what are the names of extensions that I could download the CNN/Facebook/some other's video clips?

I just downloaded it, and it looks pretty good to me. I hope that this software programmer will add another color such as dark gold or some other colors. Thank you.

I like a "DarkenBackground" extension that I have on my FireFox browser which allows me to change the color background from bright white to off-white or dark white (or other colors).

I hope that this extension will be added on my Opera. That would be perfect for everyone who need that one.

For all web-designers, please no more white background on any browsers because the white background "burn" my eyes. Ignore the website rule for the background issue. Thank you.

Okay. Thank you for the examples. I hope that it would update the printing and zoom in/out buttons for next Opera's new version.

For Opera 35.0 iMac

Where are four things that is not on Opera 35.0 - a Customize Toolbar, a Print button, Zoom In & Out buttons, and a Email Link button?