click view, add or create etc [sic] .. for exact syntax check manual, lol... now, once that window pops open, you can select various tabs labeled with various categories of info... should be able to figure it out from there. when done, click okay, then save the view if you like it.
i use a custom view for:
2 views for potential pitching/batting (draft / trade targets etc)
2 more similar views for current ability of batting/pitching (trade targets, FA searching, setting up MiL etc)
i could fit batting and pitching in one screen, but i never look at a pool of players in that way, anyway. plus, much easier to read to keep it simple and relevant to the decision at hand.
i have various filters that i will apply too.. some specifically for a custom view, even if the filter isn't always in use.
i have ratings on, so i don't look at stats much unless they are underperforming. if i did that more, i'd probably set up some custom views for pitching/batting stats, too. i'd avoid the 'conglomerate' stats like ops+/WAR in lieau of k/9 bb/9 etc .. rates that i can compare easily and define the more basic aspects of what is happening. i do like ops+... but... it's better for comparing a career than a single season. it'd be visible but limited use. (war sucks

maybe that's an acronym maybe it's not)
I make one anytime a behaviour is often enough and causes me to search for the same set of information each time... = perfect for custom view
mix/match with filters, too
edit: when i get around to it i want to change the default views a bit... e.g. "demand" added to "Default" and removing useless stuff like jersey #