> For the complete documentation index, see [llms.txt](https://wecon.gitbook.io/pistudio-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wecon.gitbook.io/pistudio-manual/8.-basic-functions/8.9-messageprompt.md).

# 8.9 MessagePrompt

**Introduction**

A message box is a window used to show some prompts or warnings to users. For example, the application process a task in the process of pop-up message box, suggesting that "detected u disk", then the customer can carry out data dump function.

**Description**

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-Lv4bDelae9baPJi7BkE%2F-Lv4dhql4jiiTou0ES7Q%2F0.png?generation=1575274078379883\&alt=media)

**1) Message**

It includes system classes (u disk, SD card, and others), chart classes (alarm, data, recipe, file list), curve classes (Trend Chart, historical XY trend Plot).

**2) Control**

**Current item:** It shows selected message information;

**Use trigger address:** When the message is triggered, the trigger address would be set ON

**For example:**

Trigger address is 011, during inserting a USB flash disk into HMI, and 011 would be set ON, once HMI recognizes USB flash disk, and display message;

**Show message:** Check it to display message when HMI is running. It is checked by default.

**Show on web:** Check it to display message when remote access HMI screen, it is unchecked by default;

**3) Message Content**

Each message has default content, but the user can set different content according to the actual situation. And the same message could be displayed in 8 languages.

**4) Reload text**

It means discard changes

**For example**

User deletes default content or modifies default content, but he wants to give up modification back to original, just click \[Reload text]

✎**Note:**

1\) If the user does not want this prompt during the running of HMI, please uncheck \[Show message];

2\) \[Reload text] function would be invalid after clicking save;

3\) These 5 special characters are not supported in the header Multilanguage settings: \[,], \[|], \[<], \[>], \[&].