Using File/Fix Subtitles menu helps when the current subtitle file needs certain issues to be solved. For example, changing the minimum interval between subtitles. Initially the following dialog will be displayed:
Fix Subtitles
Available Fix Subtitles options are divided into separate categories for easier navigation and clean preview of the selected options. Detailed description of the particular Check options/criteria available in each category can be found in the following topics:
Whenever there at least one option is selected from a category, category's name would be marked in bold and the checkbox in front of it will look like a square- 
. And when all options are clicked for a category, the checkbox in front of its name becomes fully checked - 
.
Show fix summary - when enabled displays summary of the subtitles that has been affected by the different fix options. Otherwise, when disabled, modified subtitles will directly be send to the Log List for verification.
Range options
Fix Subtitles can be started for all subtitles in the project or just for some of them using the options in the Range section.
For projects with more tracks, Fix Subtitles can be started for the selected (Default), Main or Second tracks or both Main & Second tracks at the same time. And, in addition the Filter drop-down allows you to run Fix Subtitles for selected number of subtitles only.
Creating Presets
EZConvert also provides the functionality to create Presets with the most frequently used "Fix" options.
To add new preset you can simply press the triangular button 
and select the Create New Preset option. All currently selected "Fix" options will be added for this preset. To modify the currently selected preset you just need to click the "Fix" options you want to activate or disable and then select the Save current preset option after clicking the triangular button. From the same menu you can also Delete or Rename the currently activated preset.
You can select another of your "Fix" Presets directly from the the Presets drop-down menu.