I have had great success with EasyEDA on 2 layer boards.  However, when attempting to route more complex designs (4 & 6 layer boards) with inner layers, the router never finishes, **but makes very little use of inner layers.**  In addition the auto-router routes many signals from surface mount parts (e.g. GND and VCC nets) on the top or bottom layer, when connecting directly to the VCC or GND plane using a via next to the SMT pad would be a much better choice.  Any guidance or settings on how to teach or configure the router to be more efficient would be appreciated. Thanks, An example: in which router gives up but leaves inner layer 4 (signal layer) virtually unused ... [https://easyeda\.com/editor\#id=\|51b58b49f875493c8d2cb1543e4e3edc\|828fa2c84e3349f0a67f3c683c270d4f\|ecd1d2538b084b05a5c1f0c5d7d563cc\|219e746a2c964dbd9bb581db3082f567\|7a8f3af820714960843b4d0cc60c8ca2\|9e65f0c3ebaf4606a7809f88b49ed65f\|de2daafe69a848aea1e3ed88a663a712](https://easyeda.com/editor#id=%7C51b58b49f875493c8d2cb1543e4e3edc%7C828fa2c84e3349f0a67f3c683c270d4f%7Cecd1d2538b084b05a5c1f0c5d7d563cc%7C219e746a2c964dbd9bb581db3082f567%7C7a8f3af820714960843b4d0cc60c8ca2%7C9e65f0c3ebaf4606a7809f88b49ed65f%7Cde2daafe69a848aea1e3ed88a663a712)