When Felipe searches for a relevant symbol, by default it does so using naming convention.
For example, once Felipe recognized a specific shape as a
header, it will search the selected symbol library for a shape with
'header-flp' in its name.
Instead of renaming, you can manually select which symbol will be drawn according to the shape recognized.
This will override the default behavior which relies on naming convention, and remember this change until you choose a different symbol library for this file, rename the chosen symbol, or change select a different symbol in the dropdown.