Content:
1. What does the card history show?
- History of card linking
- History of Business Rules triggering
1. What does the card history show?
The card's history tab provides full transparency of all card-related events such as task movement, owner changed, block comments, new color, selected priority, etc. Each card has a history tab.
To open it, you first need to open the card and click the History tab to see all entries. 
All new card events and updates are logged chronologically, including information about the author, additional event details, and timestamps. You can use the filter option for a quick search.
* Open the card in a new tab to get a closer view.
Notes:
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History of card linking
The card History tab provides full transparency in regards to the creation and deletion of links. Every time when users create or delete card links, the system logs entries in the card history.
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History of Business Rules triggering
A new history event will be logged every time when a business rule is executed with at least one successful action. It will be followed by an entry log for the action that has been triggered as per the rule setup. Click the rule ID and the system redirects you to the Administration Panel, where rules for automation get stored. If you need to re-configure or share the rule with other users, you can quickly access its configuration panel.
Important:
There are 5 types of actions triggered by Business rules: create, update, link, move, copy.
Each action can be performed either on the card that triggers the business rule (trigger card) or on another card (target card).
The trigger card is the card that triggers the business rule. The target card is the one in which the changes occur as a result of the rule.
Depending on the action executed, business rules will leave a history log as follows:
- The trigger card will get a ‘Rule Execution’ log with information about the rule.
- The target card will get a ‘Rule Executed’ log with information about the changes that were made.
In actions where the trigger and target card are the same (e.g. update, move, create subtask), the system logs the‘ Rule Execution’ log only.
In addition, history events will be logged every time an action is successful, even if no changes have been performed (e.g. update the color to red on a card that is already red; move a card to location and the card is already in that location; etc.).