Yes, that's reason for using the Crop function in the Develop module to first crop the image to the size you want to print before doing the export so you know what you are going to get.
The alternative is to use the Print Module in Lightroom to set up a print job and then "Print to File" but I find I have more control over using Export.
Yau-Man
The alternative is to use the Print Module in Lightroom to set up a print job and then "Print to File" but I find I have more control over using Export.
Yau-Man