Here's a tip to help with setting the Bar Lines.
It's faster and easier to create the Tempo Map using the Auto Marking Button feature. Manually mark the first four or five bars. Accurately set these bars and ensure the tempo of each bar is similar. There should not be a large variance of tempo between bars in most normal songs. ie: 157.540 - 158.234 would be reasonable. 157.540 - 185.670 is likely wrong. With the first bars edited then select the Auto Mark Button and edit them as there will be variations in the tempo. Every 8-10 bars I recommend converting an Auto Line into a Manual Line because this sections the bars into smaller segments affected by edits. Done accurately, oftentimes it's unnecessary to equalize the tempo.

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BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.