Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Can I rotate the monitor on it's horizontal axis about 90 degrees to be able to show something to someone sitting across from me?
Document: I purchased 2 of these. Once housing 2 21&#34; monitors, the other housing 2 22&#34; monitors. The swiveling capabilities of this product is nice if you have someone sitting on the other side of your desk and you want to show them something. The bottom is weighted nicely also so it doesn't feel like it is going to tip when you move the monitors around. The only price to pay for that is the bottom of the stand is a little bulky.
The horizontal tilt of each monitor had to be tightened to the max or else any slight movement to the monitor will drive it tilting downwards.3. As some people noted, the vertical tilt towards you is limited, but if you remove these removable plastic screw-covers in the back arms, it gives you a little bit more degrees.4. I was able to install this by myself but with a helper, it's easier.
It;s a solid monitor stand.... looks great, sturdy... I have no concerns about it performing it's function. I just wish they would have given us two more horizontal inches. My AOC 24's (they're really 23 and some change) bang into eachother and have to sit perfectly flat across the horizontal. There is no give for a little inward pivot unless you overlap one behind the other.
counterbalanced articulating arms), but at this price point, this is a sturdy, functional option. I was satisfied with the final arrangement I was able to create with my 22&#34; and 24&#34; monitor pair.
I was able to put this together by myself while on the couch and then using pillows to prop up the first monitor while I attached the second. I did need help moving the assembled unit back to the desk, but that's to be expected with a stable base and extra wide monitors.I have a small desk space, but wanted to use it more efficiently. The desk is not designed to allow for drilling holes and sits too close to walls in a corner to allow for clamping structures.
I have two monitors mounted to this stand, on a Asus 22 Inch monitor that has no issues, the second is a Samsung 2333HD that is two heavy for this stand. the slightest touch will cause the Samsung to lean forward by about 15 degrees. I have looked for a method to tighten the tension on the pivot, but I can not find one, either on the pivot, or online.
The first thing that impress me is how well built this stand is. Nice solid stand with strong pivot points for monitor position adjustments. Was very easy to setup. It took me longer to figure out how to remove the HP monitors built-in stand then set this up. While the setup instructions are just diagrams I thought the instruction were very easy to follow. Note:  the diagrams do show the large center bolt as optional, and is only need if you plan to bolt the stand directly to the desk.
Luckily I had a spare from another kit around. In any case, it's not something a quick run to the hardware store won't fix, but still an annoyance.
If you need to rotate your monitors daily look somewhere else or you have to modify this one.
This product is much better than I expected. The base is much deeper than the appearance in the photo. It is very sturdy and heavy. The vertical tube and horizontal supports are hardened steel and all fully adjustable. Included is hardware for hard mounting to a flat surface or a hole in a desk top. I'm using it with 2x 24&#34; displays and it works great.
Answer: Yes it will rotate it, no problem.