What best practices should be followed when modifying the appearance of a phpbb2 forum?

When modifying the appearance of a phpbb2 forum, it is important to follow best practices to ensure that the changes are implemented correctly and do not cause any issues with the functionality of the forum. Some best practices to follow include creating a child theme to make modifications, using CSS to style elements instead of directly editing core files, and regularly testing changes on a development site before implementing them on the live forum.

// Example of creating a child theme in phpbb2
// Create a new directory in the styles folder for the child theme
// Copy the template files you want to modify from the parent theme to the child theme directory
// Make your modifications to the copied template files in the child theme directory
// Select the child theme in the phpbb2 admin panel to apply the changes