Digital cameras have all sort of things to assist you in making images. Automagical stuff like focus assistance and white balance determination. Informational stuff like current shutter speed, aperture, and ISO. The information you can display while you are looking thru the viewfinder or at the LCD screen can be very helpful, and sometimes it can actually distract from your image making.
Most of the Fujifilm X series cameras have all sorts of things you can put on the screen before and after you have taken a shot. One of the things that I came to rely on is the Electronic Level1. It was the first thing I turned on when I got the X-T1 and also the X-T2. The Level as well as a rule of thirds, ninths,twelve grids can be turned on by check boxes on the Display Custom Setting menu on the Tools -> Screen Setting -> Disp. Custom Setting menu.
When the Electronic Level check box is checked there is a line across the view screen that shows as white when not level and green when level. Get the line level and you image will come out level, not needing any post processing adjustments to the frame.
And the other day I turned it off. The reason I no longer use it is that it becomes distracting when shooting. If, like I was, you are looking at the line to make sure its green you are no longer looking at the image. Getting the line to go greens may mean that the image that the camera is capturing is not the image you saw in you minds eye. Subtle shifts may introduce distractions along the edges or as I tended to do, move the fram up or down missing important details. As a photographer you are responsible for the entire image not just that it is straight. So I’m getting used to taking the energy I was using making sure the camera is straight to making sure the image I capture is the image I wanted.
I am finding that I am not usually off by more than a degree or two. Of course there are some situation where you don’t even want a level image. Then the level just gets in your way.
One of my personal projects is shooting clouds. If I don’t have any references in my image to the ground, buildings, trees or the what not, I really don’t care what is level.
I would also suggest ignoring the grid layouts as you should concentrate on the image and not necessarily if it matched the rule of thirds or any other distracting rules. Actually I would suggest you work at getting images that look balanced to you without any aids then use post production to see how close you are to the “RULES”.
If you are doing landscapes (or any other image type for that matter) on a tripod by all means turn on the electronic level and get your self all set up to make the best picture you
can. You can alway turn off the display if it starts to bother you.
1Other manufactures have different names for the level. Nikon calls it the “Virtual Horizon”.