Retraining
Source Player Core pg. 433
Retraining offers a way to alter your character choices, which is helpful when you want to take your character in a new direction or change decisions that didn't meet your expectations. You can retrain feats, skills, and some selectable class features. You can't retrain your ancestry, heritage, background, class, or attribute modifiers. You can't perform other downtime activities while retraining.
Retraining usually requires you to spend time learning from a teacher, whether that entails physical training, studying on the infosphere, or falling into shared mystical trances. Your GM determines whether you can get proper training or whether something can be retrained at all. In some cases, you'll have to pay your instructor. Some abilities, like a witchwarper's paradox, can be difficult or impossible to retrain.
When retraining, you generally can't make choices you couldn't make when you initially selected the original option. For instance, you can't replace a skill feat you chose at 2nd level for a 4th-level one, or for one that requires prerequisites you didn't meet at the time you took the original feat. If you don't remember whether you met the prerequisites at the time, ask your GM to make the call. If you cease to meet the prerequisites for an ability due to retraining, you can't use that ability. You might need to retrain several abilities in sequence in order to get all the abilities you want.
Retraining usually requires you to spend time learning from a teacher, whether that entails physical training, studying on the infosphere, or falling into shared mystical trances. Your GM determines whether you can get proper training or whether something can be retrained at all. In some cases, you'll have to pay your instructor. Some abilities, like a witchwarper's paradox, can be difficult or impossible to retrain.
When retraining, you generally can't make choices you couldn't make when you initially selected the original option. For instance, you can't replace a skill feat you chose at 2nd level for a 4th-level one, or for one that requires prerequisites you didn't meet at the time you took the original feat. If you don't remember whether you met the prerequisites at the time, ask your GM to make the call. If you cease to meet the prerequisites for an ability due to retraining, you can't use that ability. You might need to retrain several abilities in sequence in order to get all the abilities you want.
Feats
Source Player Core pg. 433
You can spend a week of downtime retraining to swap out one of your feats. Remove the old feat and replace it with another of the same type. For example, you could swap a skill feat for another skill feat, but not for a mystic feat.
Skills
Source Player Core pg. 433
You can spend a week of downtime retraining to swap out one of your skill increases. Reduce your proficiency rank in the skill losing its increase by one step and increase your proficiency rank in another skill by one step. The new proficiency rank has to be equal to or lower than the proficiency rank you traded away. For instance, if your envoy is a master in Performance and Stealth, and an expert in Society, you could reduce the character's proficiency in Stealth to expert and become a master in Society, but you couldn't reassign that skill increase to become legendary in Performance. Keep track of your level when you reassign skill increases; the level at which your skill proficiencies changed can influence your ability to retrain feats with skill prerequisites.
You can also spend a week to retrain an initial trained skill you selected during character creation.
You can also spend a week to retrain an initial trained skill you selected during character creation.
Class Features
Source Player Core pg. 434
You can change a class feature that required a choice, making a different choice instead. Some, like changing a spell in your spell repertoire, take a week. The GM will tell you how long it takes to retrain larger choices like a mystic connection or an envoy leadership style—it's always at least a month.