As far as limiting the length of the page, I found you can specify how many posts will appear on the front page in the options.

if ( is_home() || is_front_page() || is_single() || is_page() || ( is_author() && ( $count == 1 ) ) ) {

to:

if ( is_sticky() ) {

- To have a similar effect on the post-format loops you will have to add some conditional code to the effect: if `is_sticky` show `the_content` else show `the_excerpt`.
- Adding a page navigation bar at the bottom would require a bit more code than this comment would be able to convey properly, but you might look at copying the menu code in the header into the bottom of the loops as a starting point.
- Limiting the output on the main page would likely be best managed by adding a `home.php` template using the default loop code as its base.

NOTE: All of this should be done in a Child-Theme, too … and remember to back-up all of your files before making any edits.

desk-mess-mirrored.php
desk-mess-mirrored-aside.php
desk-mess-mirrored-quote.php
desk-mess-mirrored-status.php

Changing “the_content” to “the_excerpt” in the first one did indeed produce excerpts on the main page, however, it broke the formatting on other pages, made entire areas disappear, and there was no “read more” link, so it was impossible to view the entire post, even if you clicked the post to view on a single page.

The other thing is, I want the first “Sticky” post on the main page to display fully, but the remaining posts below it to be excerpts.

Also, how can I limit the length of the main page’s posts and perhaps have a page navigation bar at the bottom?

Perhaps I am asking a lot here, but I like this theme a lot.