You can preview attachments directly within the app without needing to download them. Here are the file types you can preview:
Document Files
Word: doc, docx
Excel: xls, xlsx, xlsm
PowerPoint: ppt, pptx
CSV: csv
Image Files
Formats: png, jpg, jpeg
PDF Files
Format: pdf
Video Files
Formats: avi, mp4, mov
Email Files
Format: eml