# Pattern Drain Design
This design tool allows for simple design of many parallel drains at once.
The pattern drain window allows you to select specific drains to delete.The '**Delete**' and '**Clear All**' buttons allow you to either delete selected drains or all pattern drains.'**Drain length**' can either be set here or by moving the red circle on the design map.'**Drain Heading**' is the direction that the drains run (represented as degrees).‘**Padlock**’ button changes the behaviour of the copied drains in relation to the original.locked - This locks ‘Drain Heading’ to ‘Offset Direction’ so if either are adjusted the other will change to match.Unlocked - ‘Drain Heading’ and ‘Offset Direction’ can be set independently of each other.'**Offset Direction**' sets the direction in which copy drains will be created from the original.'**Drain Count**' is the number of drain copies you want to add (not including the original drain).'**Drain Offset (Parallel)**' is the distance between each line of the copies. (if the padlock is unlocked this will not show in the example until it is manually updated.)‘**Drain Offset (Origin)**’ is the set distance between the origin point of each copy.Press '**Apply**' (shown as the pattern drain icon) after parameters are entered.Once you are happy with the drain paths use the ‘**Drain Design**’ function to design the profile and cross section of the drains.