Notepad does not support direct case-sensitive searches, but can be achieved through alternative tools or workarounds. 1. Notepad is case-sensitive when searching by default, and the settings cannot be changed; 2. Use Notepad to truly realize case-sensitive search, by checking the "Case-sensitive" option; 3. Native Notepad can help mark target text through replacement functions, but the effect is limited; 4. It is recommended to use more powerful editors such as Notepad or VS Code for long-term needs.

Notepad itself does not support direct case-sensitive searches, which is one of its functional limitations as a basic text editor. However, if you do need to implement similar functions in the "Notepad" that comes with Windows, you can get closer to the goal through some workarounds.

When using the search function, please be careful not to be case sensitive by default

When you press Ctrl F to open the "Find" window, Notepad will automatically ignore case when entering keywords. For example, searching for "hello" will also match different forms such as "HELLO" and "Hello".
This behavior is built-in and cannot be changed by setting. Therefore, if you need to match the upper and lower case exactly, you can only find another method.

Using alternative tools: Notepad to achieve true case-sensitive search

If you have higher requirements for features, it is recommended to use Notepad , a free, open source, feature-rich text editor that fully supports case-sensitive searches:

• Install and open Notepad
• Press Ctrl F and switch to the "Find" tab
• Enter the content you want to search in the Find Content box
• Check the "Case-sensitive" option (Case-sensitive)
• Click "Find Next" to start the exact match

This method is suitable for scenarios such as code editing, log analysis, etc. that require strict matching.

Temporary workaround: Use replacement function to assist in marking target text

If you stick to native Notepad, you can try a trick that is not very intuitive but has some effect:

1. Copy the original text and paste it into the new document.
2. First look for the lowercase word you want (such as "apple") and replace it with a special symbol (such as "[apple]".
3. Then look for capital or mixed writing methods (such as "Apple" or "APPLE"). If they are also replaced, it means that there is no distinction; otherwise partial filtering is achieved.

Although this method is cumbersome and cannot completely replace the real case-sensitive function, it can be used in certain specific situations.

Basically that's it. If you want to use case-sensitive search function for a long time, it is recommended to switch to more powerful editors, such as Notepad or VS Code. The Notepad is lightweight, but it is indeed limited in functionality.

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