Sigline Guides
Step-by-step guides — Excel formula walkthroughs, email signature guides, examples, troubleshooting, and practical tools.
How to Write a SUMIF Formula in Excel (2026 Guide)
SUMIF, explained plainly: the syntax, 5 real examples (text, numbers, dates, wildcards, SUMIFS), and the 4 mistakes that break it.
Read the guide →VLOOKUP vs XLOOKUP: Which One Should You Use? (2026 Guide)
The honest comparison: syntax, what each one can and cannot do, when to keep VLOOKUP, and when XLOOKUP wins — with real examples.
Read the guide →How to Use INDEX and MATCH Together in Excel (2026 Guide)
What each one does alone, the lookup that replaces VLOOKUP, a two-way lookup, and the 3 mistakes that break it.
Read the guide →Excel IF Formula: How to Write One, With Examples (2026 Guide)
The IF syntax once, then five examples that cover nearly every IF you will ever write — pass/fail, grades, IFS, AND/OR, IFERROR.
Read the guide →How to Combine Text in Excel: CONCAT, TEXTJOIN and & (2026 Guide)
Three ways to glue text together — when to use each, with real examples for full names, addresses, and lists, and the mistakes that break them.
Read the guide →Why Is My Outlook Signature Not Showing Images? (Fix Guide)
Broken image icons or red X in Outlook? Six real fixes: public image hosting, download settings, size limits, and the recipient-side problem.
Read the guide →Email Signature Size Guide: Photo, Logo & Banner Dimensions
Exact dimensions for headshots, logos, banners, and social icons — plus formats, retina rules, and file-size limits that keep signatures fast.
Read the guide →How to Convert a Bank Statement PDF to Excel (2026 Guide)
Four methods compared — Excel's built-in import, copy-paste, online converters, and a free tool that never uploads your file. Plus the 2-minute sanity check.
Read the guide →How to Add an Email Signature in Gmail (2026 Guide)
Step-by-step: create a Gmail signature on desktop and mobile, paste a formatted signature, and fix images. Free generator included.
Read the guide →How to Add an Email Signature in Outlook (2026 Guide)
Add a signature in Outlook on Windows, Mac, and the web: exact steps for classic and new Outlook, plus defaults for replies.
Read the guide →7 Professional Email Signature Examples for Realtors
Realtor email signature examples with photos, listings links, and compliance lines — plus what to include and what to skip.
Read the guide →How to Add a Photo or Logo to Your Email Signature
Add a headshot or logo to your Gmail or Outlook signature: hosting, sizing, and step-by-step instructions that actually work.
Read the guide →How to Add a GIF to Your Email Signature (2026 Guide)
Add an animated GIF to your Gmail or Outlook signature — steps, size limits, the Outlook first-frame gotcha, and fun-but-professional ideas.
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