Documentation

Getting started

• Open an application from the desktop shortcut, the Start menu or by double-clicking a file. The File tab opens the Home screen with recent files and templates.
• Tabbed toolbar: Home, Insert, Layout, References, Review, View, Help. Press Ctrl+F1 to collapse it.
• Save with Ctrl+S; default formats are .docx/.xlsx/.pptx. Default font Times New Roman 13 pt (documents) and 11 pt (spreadsheets).

File formats

O3O Doc

• Styles and automatic table of contents: References → Table of Contents.
• Track changes: Review → Track; comments: Ctrl+Alt+C; compare documents.
• Mail merge from a spreadsheet: Mailings → Mail Merge.
• PDF export (including PDF/A) and digital signatures: File → Export, File → Digital Signatures.

O3O Sheet

• Standard English functions (SUM, VLOOKUP, XLOOKUP, SUMIFS, INDEX/MATCH) with autocompletion.
• Move columns or rows by selecting the whole column and dragging its header; undo with Ctrl+Z.
• Pivot tables: Insert → Pivot Table; charts: Insert → Chart; conditional formatting on the Home tab.

O3O Slide

• Layouts panel on the right; masters under View → Master.
• Transitions and Animations tabs; F5 to present, Shift+F5 from the current slide; presenter view on dual screens.

O3O PDF

• Annotate, highlight, draw and add text; fill forms and export with File → Export → PDF.
• Sign with organisational or personal certificates; convert PDF to text by opening it in O3O Doc with the "PDF – Text" filter.

Licensing

• Help → Licence shows current prices, lets individuals or companies (tax code lookup) buy by bank QR, and accepts licence keys of the form O3OY-… / O3OL-….
• After activation: Download certificate and Download invoice; verify certificates at office.o3o.vn/xac-thuc.
• Move to another computer with Licence → Remove from this computer, then enter the key on the new one.

Language and theme

The Vi / En button on the quick toolbar opens the language chooser with ten languages; the Light / Dark button switches the theme. The application restarts to apply the language.

Default application

Help → Set as default application opens the Windows Default Apps page for O3O Office directly, where one click assigns all supported formats.

Keyboard shortcuts