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How to display time in 15-minute increments (CEILING and FLOOR functions) Excel

In the last issue, we introduced how to use the TIME function to display the time in 15-minute increments, 30-minute increments, etc. (TIME function) Excel pointed out that it would be easier to use the CEILING and FLOOR functions...

2024.06.18

Excel Functions

Digital certificate can no longer be selected when logging in to a site (Edge)

Have you ever seen the following error message when using login with a digital certificate? The certificate you have selected is not available for this service. Please close all browser windows and try again. Internet ban...

2024.08.02

Edge

Absolute and relative references in Excel (Excel)

Absolute and relative references are explained below. Relative reference: If you want to display the same contents in cell "C3" as in the neighboring cell "B3", enter the following in cell "C3": =B3. If you want to display the same content in cell "C3" as in the neighboring cell "B3", enter the following in cell "C3": =B3

2023.12.27

Excel Functions

Forgot Password? How to Remove Read-Only (Write Protection) in Excel

If you forgot your Excel password, don’t worry! This article explains how to remove write protection easily by simply changing the file extension. Learn how to unlock read-only mode fast.

2025.07.12

Excel Functions

How to Use Wavy Lines to Crop or Skip Part of an Image in Excel

Master the wavy line technique to compress images in Excel! Step-by-step tutorial showing how to create professional image breaks and save space in your spreadsheets and presentations.

2025.08.07

Excel Functions

Automatically create invoices from sales invoices3 Excel (Excel)

Continuing from the previous article, "Creating Invoices Automatically from Sales Statements 2: Excel," we will now move on to creating invoices. If you haven't read it yet, please also read "Creating Invoices Automatically from Sales Statements 1: Excel". Putting details on an invoice (using a macro)...

2024.05.16

Excel Macro (VBA)Let's make an invoice from a sales invoice.

Forgot Password] How to remove sheet protection Excel (Excel)

I have a "sheet-protected" Excel file that I really need to unprotect, but the person in charge of applying the protection has already left the company or lost the memo, and I don't know the password. In such cases, do I have no choice but to give up? No, you can...

2024.10.29

Excel Functions

[For Beginners] Step-by-Step Guide to Installing SeleniumBasic

This article offers a beginner-friendly, detailed guide to installing SeleniumBasic. Stuck on the installation and thinking about giving up on automation? The truth is, anyone can install it by taking it one step at a time. A professional with 20 years of experience teaching Excel will walk you through the process.

2025.06.16

Excel Macro (VBA)

How to apply mosaic (blur) Excel

When you are preparing a document or manual for external publication, you may need to refer to a web site or a screen where non-public information is visible. In such a case, you would like to put a mosaic like this on the non-public part. We will explain this method in detail in this issue...

2024.07.05

Excel Functions

Top 4 Ways to Write Vertically in Excel: Features, Pros, and Best Use Cases

Excel is normally designed to be written horizontally, but it can also be written vertically. There are several ways to do this, but in this article, we will introduce four methods, two using "cell formatting" and two using "text boxes. Using "Vertical Writing" Cell Formatting1....

2025.05.30

Excel Functions