contract/contract_price_revision/readme/USAGE.md

To use this module:

1. Go to Invoicing > Customers > Customer Contracts if you are a billing user.
2. Select as many contracts as you want to update line prices.
3. Click on Action button and execute the wizard Create revision of contract lines.
4. Enter date start from which the new price will be valid and enter date end and percentage to increase old contract lines.
5. By clicking on Apply button, a new contract line will be created with a price increased accordingly to the percent entered. Old contract lines will have as ending date the day before the entered date.
6. When create invoices related to contracts selected, prices will be update with the prices that are not out of date.
7. When managing contract with recurrence on line level, you maybe want not to revise price for some lines. Check 'Never Revise Price' on line level to avoid price revisions.