Office tools rely on functions that most users only exploit to a fraction of their capacity. Mastering office tools on a daily basis involves adopting a few specific mechanisms that reduce the time spent on repetitive tasks. This article details concrete tips, categorized by complexity level, to transform the way a spreadsheet, a word processor, or a presentation tool works in your hands.
Styles and structure in a word processor: the often-overlooked foundation
A Word or LibreOffice Writer document contains a system of hierarchical styles (Heading 1, Heading 2, Normal, etc.) that conditions everything else. Applying a style to a heading is not the same as manually changing the font size: the software records the document’s hierarchy, allowing for the generation of an automatic table of contents in two clicks.
This structure also has a direct impact on accessibility. The RGAA recommendations emphasize hierarchical headings, actual lists (created via the dedicated button, not with manual dashes), and alternative text on images. These actions are performed in the source document, not at the time of exporting to PDF.
To go further on office functionalities and their uses, many resources are available on the The Web Brains website, which gathers guides categorized by software and level.
The most cost-effective tip in a word processor remains the creation of a custom template. Rather than reformatting each new document, save a .dotx file (or .ott in LibreOffice) with your styles, margins, headers, and footers already configured. A well-designed template eliminates several minutes of formatting per document.
Excel keyboard shortcuts: automate without macros
Excel remains the office tool where the gap between a beginner user and an intermediate user is most clearly measured in time. The majority of this gap does not come from complex formulas, but from navigation and selection.
Three shortcuts transform the speed of work on a spreadsheet:
- Ctrl + Arrow key: jumps to the last filled cell in a direction. On a table with several hundred rows, this shortcut replaces manual scrolling.
- Ctrl + Shift + Arrow: selects the entire range of data at once, allowing you to copy, delete, or format entire columns without touching the mouse.
- F4 after entering a formula: repeats the last action. When formatting a table, this key avoids having to redo the same operation cell by cell.
Beyond shortcuts, the conditional formatting feature remains underutilized. It allows you to automatically color cells based on their value (stock threshold, overdue date, budget overage). Setting it up takes a few seconds and makes a table readable without line-by-line reading.
Accessibility of office documents: a constraint that has become regulatory
Since June 28, 2025, the European Accessibility Act applies to certain public services and specifically covers office files and PDFs provided as part of these services. The exact scope depends on the service and the organization concerned, but the signal is clear: structuring documents for accessibility is no longer optional in many professional contexts.
In practical terms, producing an accessible document involves a few reflexes at the time of writing:
- Use heading styles instead of large bold text, so that screen readers can navigate the document.
- Provide alternative text for each inserted image, even a logo or a chart.
- Create tables with declared column headers (via table properties), not just with simple visual formatting.
- When exporting to PDF, check that the structural tags are preserved. Word offers a dedicated checkbox in the save options.
These actions take a few seconds per document. Their absence renders a file unusable for a visually impaired person and, in some cases, non-compliant with regulations.
Copilot and AI in Microsoft 365: what to prepare before activating
The integration of artificial intelligence into office tools is progressing rapidly. Microsoft Copilot, integrated into the 365 suite, can draft documents, summarize files, or generate Excel formulas from natural language instructions.
However, activating Copilot without auditing SharePoint access rights is a real risk. The AI accesses files based on existing permissions. If shared folders have overly broad rights (which frequently happens in organizations that have never cleaned up their structure), Copilot may expose confidential documents in its responses to unauthorized users.
Before any deployment, an audit of SharePoint and OneDrive permissions is essential. This means checking who has access to which folders, restricting open shares, and segmenting file spaces by team or project.
PowerPoint: reduce production time without sacrificing readability
The Slide Master function in PowerPoint (or Master Slide in LibreOffice Impress) defines the overall layout of a presentation. Changing the font, colors, or logo position in the master reflects the change on all existing slides.
Working without a master means reformatting each slide individually, which explains why some presentations take hours instead of minutes. A well-configured master also ensures visual consistency, even when multiple people contribute to the same file.
Image management also deserves a reflex: compressing visuals directly in PowerPoint (Image Format tab, then Compress Pictures) significantly reduces file size, preventing email sending issues and slowdowns in slideshow mode.
Each office tool contains functions that, when taken in isolation, seem minor. Combined, they change the amount of time spent on formatting rather than content. The common thread of all the tips presented here can be summed up in one sentence: configure once correctly to avoid returning to it.
