Converting Measures of Notes

I didn't really know how to title the subject of this question, and I hope I can explain what I'm trying to do. In the most simplest of examples, if I have four measures of 16th notes, is there an automatic way to convert that to eight measures of 8th notes (leaving the tempo the same)? This would apply to an entire score. I only use Musescore for drumline writing if that matters. So even looking at a measure that's written as 16th notes all with a tremolo indicating 32nd notes (a roll), I would like a way to convert that into two measures of just 16th notes. Am I making any sense?