Right-click the program, click Properties, change the settings then click Apply and OK. I have to apologize for not telling you the specific setting or tab--I don't have my Win98SE computer available to me. 🙁

Thanks, this is what I'm doing right now.
The issue is that I need to do that for every DOS program. And sometimes DOS programs are launched from Windows Launchers, then I don't even know where the DOS exe is to change its settings.

What I would like is to set those settings for ALL DOS programs, by default, not only those that I've set the settings by hand.

There is a way to do this. IIRC, there is a .PIF file that is used as the default. I apologize for this, but I don't know what it's called or where it's located. 🙁

YES! That's it!
I've found the archival article Q131877 that describes the method using the secret "_DEFAULT.PIF" file name: https://jeffpar.github.io/kbarchive/kb/131/Q131877/

Thanks for the pointing out the existence of the secret .PIF file.

I'm attaching the method here in case the original website goes down:

Article: Q131877 Product(s): Microsoft Windows 95.x Retail Product Version(s): Operating System(s): Keyword(s): Last Modified […]
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Article: Q131877
Product(s): Microsoft Windows 95.x Retail Product
Version(s):
Operating System(s):
Keyword(s):
Last Modified: 17-DEC-2000

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The information in this article applies to:

- Microsoft Windows 95
-------------------------------------------------------------------------------

SUMMARY
=======

This article describes how to create a default program information file (PIF)
for MS-DOS-based programs.

MORE INFORMATION
================

A default PIF file for MS-DOS-based programs is used for those MS-DOS-based
programs that are not shipped with their own PIF files, and are started by
clicking Run on the Start menu. To create a default PIF file for MS-DOS- based
programs, follow these steps:

1. Open the Windows folder.

2. On the File menu, point to New, then click Shortcut.

3. In the Command Line box, type "command.com" (without the quotation marks) ,
then click Next.

4. In the "Select a name for the shortcut" box, type "_DEFAULT" (without the
quotation marks) , then click Finish.

5. Use the right mouse button to click the new _DEFAULT.PIF file, then click
Properties on the menu that appears.

6. Set the properties you want for the _DEFAULT.PIF file, then click OK.

7. Restart Windows 95.

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Keywords :
Technology : kbWin95search kbZNotKeyword3

=============================================================================

I'm glad I was helpful. 😀