I use Microsoft Paint to generate a lot of explanatory images. For the benefit of visibility, I often wish to display my resulting image in the center. This often means I have to include spacing along the vertical borders of the image, as other formatting options are not available. A good example of such a situation is here, on Stack Exchange, but it is not the only time I run into this problem.
I like to ensure pixel perfect symmetry, whenever possible, simply as a personal preference. I have to ways in which I would often go about this.
If I have the time, I will draw perfect diagonal lines, by drawing a diagonal line while holding SHIFT. The lines provide clear steps to allow measurements; in most cases, I can simply select the diagonal line with the rectangular selection tool, paste a copy of the selection, performing a horizontal flip, and place it inline with the image on the opposite side. These diagonal lines then act as a guideline to provide equal spacing, before I remove the lines from my final image.
Other times, I will simply make a marker at the global center point. By ensuring I only select the area encompassing my image, I can align this marker with the local center point of my selection, which gives me a reasonably accurate center position. I can than simply crop the bottom area, removing the marker in its entirety.
Adding the space, in these ways, are not necessarily a time sink; I have no problem continuing to do so in this manner, but I wonder if there may be an easier way. I am aware that Microsoft Paint has its limitations, which are quite severe, in comparison to other image editing software. At the same time, it provides the basic necessities I require, and nothing else.
Is there a more efficient way to add uniform spacing to center an image?