EmEditor shows the Show Clipboard History button when the Paste (CTRL + V) command was selected. Clicking this button or selecting the Show Clipboard History (Ctrl+Shift+V) command displays the Clipboard History, which allows you to quickly select a previously used clipboard text.
In the clipboard history menu, you can choose in what format you want to paste in. For example, if you copied from a webpage, you can include the full HTML tags, not just the inner text. If you copied comma-separated text like
1,2,3, you can choose to paste it as a value in a single CSV cell or in 3 separate cells.
To store the clipboard history when copied other programs, you will need to enable Monitor the Clipboard copied on External Applications in Tools | Customize… | Clipboard page.