Understanding the general structure The first step is the key to create a robust and optimized layout. Based on the Action file format structure (see See Descriptor structure) Key is ‘PxSc’. Data is as follows: Pixel Source info 4 Version ( = 16 ) Variable Descriptor. Data is as follows: Filter Mask 4 Identifier ( = ‘soLD’ ) 4 Version ( = 4 ) 4 Descriptor Version ( = 16) Variable Descriptor of placed layer information Key is ‘vstk’ . Data is as follows: Vector stroke setting 4 Version ( = 16 ) Variable Descriptor.