Created attachment 147917 [details]
I exported the document in attachment both as PDF and PNG (300dpi PNG), and the PNG image gets cut.
No repro with
Build ID: beae6c7a7f163daad0d4dea63a3d403af2745fd1
CPU threads: 4; OS: Windows 6.3; UI render: default; VCL: win;
TinderBox: Win-x86@42, Branch:master, Time: 2018-12-06_23:55:16
Locale: en-US (nl_NL); UI-Language: en-US
I can not confirm with Version: 126.96.36.199.alpha0+
Build ID: ef58bf56ad292656ad2de0a417eda72cc170f782
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3;
Attach printscreen of PNG export options. What's your OS?
Created attachment 148064 [details]
Screenshot of DPI options
Here is the screenshot.
Windows 10 Pro x64.
It seems to be fixed in 6.2.4.