Start with your target size based on the recipient mail service attachment limit.
2
压缩顺序
Compress in steps: begin at medium level, check readability, then reduce further only if needed.
3
文档类型策略
Text-heavy PDFs are usually optimized with minimal visible loss, while image-heavy PDFs need resolution tuning.
4
命名版本
Use consistent naming and versioning in both filename and email body.
5
移动端检查
Always test openability on mobile before sending to clients.
6
团队标准
If this is recurring work, standardize one default compression level across your team.