First and foremost, accessibility is a must for software design in a digital age. If your custom software is accessible, then it would reach the widest population, including the disabled, and increase your potential number of users. Here's how you can make your custom software more accessible to all users.

1. Understand Accessibility Guidelines
   The first step to making accessible software is familiarizing yourself with the existing accessibility guidelines. A good start to these would be the Web Content Accessibility Guidelines. These guidelines provide detailed strategies to increase the accessibility of Web content for a person with a disability. For software applications, many of the WCAG principles remain applicable so that your software is made more perceivable, operable, understandable, and robust.

2. Conduct User Research
   Engage with your users to understand individual user needs. This could be through surveys, interviews, and usability testing with people with different disabilities. Knowing the challenges your users face allows you to deal with those challenges head-on when designing your software.

3. Implement Keyboard Navigation
   Make sure all the software features are available using only the keyboard. Many users cannot use a pointing device and rely on the keyboard. It is therefore very important that one can access all actions and all interactive elements from the keyboard.

4. Provide Text Alternatives
   Provide text alternatives for non-text content, such as images, videos, and graphics. Alt text for images, transcripts for audio, and video captions will ensure accessibility for the visually impaired and hard-of-hearing audience. This is to make your software discoverable for SEO purposes, too.

5. Use Accessible Color Schemes
   Color contrast is important for users with vision impairments, including color blindness. Be sure that the color used for text significantly contrasts with the color used in the background. Contrast checkers can help you determine whether your color scheme is accessible.

6. Ensure Screen Reader Compatibility
   Screen readers are important tools for users who are blind or have low vision. A screen reader user should be able to get any information on your software. Use semantic HTML and ARIA roles for providing a better context to screen readers.

7. Simplify Navigation
   Clear and simple navigation helps all users, but most of all, users with cognitive disabilities. Use consistent layout and design patterns in your software. Avoid clutter and make interactive elements recognizable and usable.

8. Offer Customization Options
   Allow your users to customize to suit them. This may be changing font size, color scheme, or different input methods. Flexibility in your software design can go a long way in making your product more accessible.

9. Regularly Test and Update
   Accessibility is an ongoing process. Test your software continuously with users and make updates based on their feedback. You can also use automated accessibility testing tools to help recognize problems, but they should complement, not replace, user testing.

10. Partner with Accessibility Experts
    Consider hiring accessibility experts to audit your software and provide you with detailed recommendations. This investment can pay off through the assurance that your software is meeting high accessibility standards and avoiding potential legal issues.

Conclusion
Making your custom software more accessible is not just about compliance; it's about creating an inclusive experience that benefits all users. By developing your software to include accessibility, you show your commitment to user-centered design. A software development company focused on accessibility not only boosts its reputation among users but also opens up its possibilities to even more and, hence, helps move toward an even more inclusive digital environment.