Pixinsight Lerar Link Guide
"PixInsight LRGB Combination"
I have interpreted your request as (using the Luminance, Red, Green, and Blue channels). "Lerar" appears to be a typo for "LRGB," which is the most common workflow topic associated with that letter sequence in astrophotography processing.
Introduction to PixInsight
Remember: The best “Lerar Link” is a deliberate one. Don’t let WBPP guess. Manually curate your reference frame, check your links, and always – always – review the output vectors. pixinsight lerar link