I have many XML files which include parameters with the following syntax:
<CustomElement url="http://www.#[domain]/#[sub]" />
#[whatever] is replaced by a value before runtime but scanning through a lot of elements make it hard to recognize that an element needs a value.
Is it possible to configure PyCharm to highlights only #[] parts so it's easier to find the params?
No, it's not possible to configure this via the UI. You can write a plugin that will highlight those sequences.