is it possible to set the custom fields horizontally instead of going too long vertically on the page if we have a lot of custom fields?
Yes. Read the Guide: https://www.manager.io/guides/17100.
you cannot set them to appear horizontally on your entry form.
but you can set them to show anywhere on the final document as explained in the guide linked by @Tut
if you have a lot of custom fields, try positioning them in any order relevant to you so that the least used custom field appears at the end. this is explained in the guide Use custom fields | Manager
is it conceivable to set the custom fields evenly as opposed to going too long vertically on the page in the event that we have a lot of custom fields?
@dmoose, please read the thread before you add a post to it.