Hybrid way to get high resolution ggplot image using RStudio export function?

I am using ggplot2 with RStudio to generate a 300dpi image. However, the method using "tiff (" test.tif "...)" created a wire image with very large text and very little plot; while the export function in RStudio is handy for use with useful interactive graphics for scaling, but does not allow for 72 dpi low resolution images. Is there any hybrid way of dealing with high resolution operations and interactive imaging?