You have tacked onto an old thread that first dealt with the very dated VP 7.x series. Many changes have been made since.
Please state exactly what you intend and the steps you use to accomplish it. Folks here will chip in with suggestions.
VP provides many sizing/crop/scaling options. As with any NLE, there's a learning curve.
Enable Dual Preview Mode in OPTIONS | DISPLAY to see what is actually being applied to the sequence as you adjust parameters in the preview window