Characters at your setting may spend up to X matching Attribute Marker(s) to get 1 additional Impact instead of +2 for each marker. This is done during the “use Attribute Markers for the task” step of performing a task (step 3). 

Clarifications:

• As usual, you can only spend 1 charge from each individual marker when using Attribute Markers for a task.
• This can be combined with Flexible to use a non-matching Attribute Marker to get 1 additional Impact.
• Only the regular +2 bonus from the attribute marker is replaced. If an effect grants additional effects to an attribute marker (e.g. additionally +1), those effects still apply.