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+# Images Filename Name and Subdirectory
+
+By default, the Wub UI save images with a file name structure of
+
+`number`-`seed`-`[prompt_spaces]`
+
+```
+01234-987654321-((masterpiece)), ((best quality)), ((illustration)), extremely detailed,style girl.png
+```
+
+If this does not suit you it can be configured under settings.
+
+`settings tab` > `Saving images/grids` > `Images filename pattern`
+
+subdirectory can also be configured under settings.
+
+`settings tab` > `Saving to a directory` > `Directory name pattern`
+
+# Pattens
+Web-Ui provides several patterns that can be used as placeholders for inserting information into the file name,
+user can chain these patterns together, forming a filename that suits their use case.
+
+| Pattern                        | Description                                          | Example                                                                                                                               |
+|--------------------------------|------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------|
+| `[seed]`                       | Seed                                                 | 1234567890                                                                                                                            |
+| `[steps]`                      | Steps                                                | 20                                                                                                                                    |
+| `[cfg]`                        | CFG scale                                            | 7                                                                                                                                     |
+| `[sampler]`                    | Sampling method                                      | Euler a                                                                                                                               |
+| `[model_hash]`                 | Hash of the model                                    | 7460a6fa                                                                                                                              |
+| `[width]`                      | Image width                                          | 512                                                                                                                                   |
+| `[height]`                     | Image hight                                          | 512                                                                                                                                   |
+| `[styles]`                     | Name of the chosen Styles                            | my style name                                                                                                                         |
+| `[date]`                       | Date of the computer in ISO format                   | 2022-10-24                                                                                                                            |
+| `[datetime]`                   | Datetime in "%Y%m%d%H%M%S"                           | 20221025013106                                                                                                                        |
+| `[datetime<Format>]`           | Datetime in specified \<Format\>                       | \[datetime<%Y%m%d_%H%M%S_%f>]<br>20221025_014350_733877                                                                                   |
+| `[datetime<Format><TimeZone>]` | Datetime at specific \<Time Zone\> in specified \<Format\> | \[datetime<%Y%m%d_%H%M%S_%f><Asia/Tokyo>]`<br>20221025_014350_733877                                                                                       |
+| `[prompt_no_styles]`           | Prompt without Styles                                | 1gir,   white space, ((very   important)), [not important], (some value_1.5), (whatever), the end<br>                                     |
+| `[prompt_spaces]`              | Prompt with Styles                                   | 1gir,   white space, ((very   important)), [not important], (some value_1.5), (whatever), the end<br>,   (((crystals texture Hair)))，((( |
+| `[prompt]`                     | Prompt with Styles, Space bar replaced with`_`       | 1gir,___white_space,_((very_important)),_[not_important],_(some_value_1.5),_(whatever),_the_end,_(((crystals_texture_Hair)))，(((     |
+| `[prompt_words]`               | Prompt   with Styles, Bracket and Comma removed      | 1gir white space very important not important some value 1 5 whatever the   end crystals texture Hair ， extremely detailed           |
+
+### Datetime Formatting details
+Reference python documentation for more details on [Format Codes](https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes)
+
+### Datetime Time Zone details
+Reference [List of Time Zones](https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/List-of-Time-Zones)
+
+If `<Format>` is blank or invalid, it will use the default time format "%Y%m%d%H%M%S"
+tip: you can use extra characters inside `<Format>` for punctuation, such as `_ -`
+
+If `<TimeZone>` is blank or invalid, it will use the default system time zone
+
+The Prompts and Style used for the above `[prompt]` examples
+
+Prompt:
+```
+1gir,   white space, ((very important)), [not important], (some value:1.5), (whatever), the end
+```
+Selected Styles:
+```
+(((crystals texture Hair)))，(((((extremely detailed CG))))),((8k_wallpaper))
+```
+
+note: the `Styles` mentioned above is referring to the two drop down menu below the generate button
+
+### if the Prompts is too long, it will be short
+this is due to Computer has a maximum file length
+
+# Add / Remove number to filename when saving
+you can remove the prefix number 
+by unchecking the checkbox under
+
+`Setting` > `Saving images/grids` > `Add number to filename when saving`
+
+with prefix number
+```
+00123-`987654321-((masterpiece)).png
+```
+
+without prefix number
+```
+987654321-((masterpiece)).png
+```
+
+### Caution
+The purpose of the prefix number is to ensure that the saved image file name is **Unique**.
+If you decide to not use the prefix number, make sure that your pattern will generate a unique file name,
+
+**Otherwise files might be Overwritten**.
+
+Generally datetime down to seconds should be able to guarantee that file name is unique.
+
+```
+[datetime<%Y%m%d_%H%M%S>]-[seed]
+``` 
+```
+20221025_014350-281391998.png
+```
+
+But with some **Custom Scripts** might generate **multiples images** using the **same seed** in a **single batch**,
+
+in this case it is safer to also use `%f` for `Microsecond as a decimal number, zero-padded to 6 digits.`
+
+```
+[datetime<%Y%m%d_%H%M%S_%f>]-[seed]
+```
+```
+20221025_014350_733877-281391998.png
+```
+
+# Filename Pattern Examples
+
+If you're running Web-Ui on multiple machines, say on Google Colab and your own Computer, you might want to use a filename with a time as the Prefix.
+this is so that when you download the fouls you can put them in the same folde.
+
+Also since you don't know what time zone Google Colab is using, you would want to specify the time zone.
+```
+[datetime<%Y%m%d_%H%M%S_%f><Asia/Tokyo>]-[seed]-[prompt_words]
+```
+```
+20221025_032649_058536-3822510847-1girl.png
+```
+
+It might also be useful to set Subdirectory the date, so that one folder doesn't have too many images
+```
+[datetime<%Y-%m-%d><Asia/Tokyo>]
+```
+```
+2022-10-25
+```