Ability to hide lines instead of overlaying

[rymndhng]

Love this library! One feature request I have (and I don't know if it's possible) is to be able to hide the lines in a presentation instead of adding an overaly.

The use case is for inline imeages. An inline imagine will have bunch of metadata, and this currently renders three empty lines in org-present mode.

Input:

* Model the Boundaries
Help us build intuitions on cause & effect, starting from the outside.

#+CAPTION: Hexagonal architecture
#+DOWNLOADED: https://herbertograca.files.wordpress.com/2017/03/hexagonal-arch-4-ports-adapters2.png?w=1100 @ 2019-10-10 15:05:58
#+attr_html: :width 300px
[[File:Understanding_Legacy_Systems/hexagonal-arch-4-ports-adapters2_2019-10-10_15-05-58.png]]

Output: (note the highlighted extra lines)