> For the complete documentation index, see [llms.txt](https://kb.logicerp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.logicerp.com/logic-erp-learning-hub-tutorials-and-best-practices/billing/setup-appointments/packages/package-parameters.md).

# Package Parameters

**Available on:** Desktop · Web · Phone

**Parameters** are the details you record about a client at each visit — hair fall, skin type, weight, blood pressure, a before/after photo. Here you decide **which details** are recorded for a package or a service, and how. The values themselves are entered in the **Parameter Values** window at check-in and billing — see [Check-In and Parameter Values](/logic-erp-learning-hub-tutorials-and-best-practices/billing/setup-appointments/appointments/check-in-and-parameter-values.md).

In Setup Appointments, open the menu and double-click **Packages › Package Parameters**, or click **Parameters** in **Setup Package**. The window is titled **Define Package Parameters**.

You need the right to change the appointment configuration. Without it the window only shows the parameters.

## Choosing what to set up

* **Type** — **Package** or **Service**.
* **Select** — the package or the service. For *Package*, only fixed services packages are listed (only this branch's, if packages are kept branch-wise). For *Service*, every service is listed, so parameters work without packages too.

A package service uses the **package's** parameters if the package has any that are not hidden; otherwise the **service's** own.

## The parameters

Everything you type in the grid is entered in capitals.

| Column                       | What to enter                                                                                                                                                             |
| ---------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **PARAMETER NAME**           | The internal name, up to 30 characters — unique for this package or service                                                                                               |
| **DISPLAY NAME**             | The name shown in the Parameter Values window, up to 50 characters (required)                                                                                             |
| **DESCRIPTION**              | A longer explanation, up to 255 characters                                                                                                                                |
| **DATA TYPE**                | **Numeric**, **String** (text), **Boolean** (yes/no) or **Image**                                                                                                         |
| **MAX LENGTH**               | For text, the most characters allowed — up to 250. 0 means no limit                                                                                                       |
| **MAX VALUE**, **MIN VALUE** | For numbers, the allowed range. 0 means no limit                                                                                                                          |
| **REQUIRED**                 | **YES** if the value must be filled in                                                                                                                                    |
| **HIDE**                     | **YES** hides the parameter from the Parameter Values window without deleting it                                                                                          |
| **THRESHOLD**                | A note for your own reference, such as a normal range (up to 50 characters). It is only saved here — it is not checked and does not appear in the Parameter Values window |

Click **Save** and answer *"Are you sure to save selected records"* — then *"Parameter Defined Successfully"*. Messages you may see:

* *"Invalid Parameter Name."*, *"Invalid Display Name."*, *"Parameter Name Already Exists."*
* *"Parameter Name can't be longer than 30 characters."*, *"Display Name can't be longer than 50 characters."*, *"Description can't be longer than 255 characters."*, *"Threshold can't be longer than 50 characters."*, *"Maximum length can't be greater then 250"*
* *"Minimum value can't be greater than maximum value."*
* *"Select a package or service first!"*

### **Removing a parameter**

Select its row and press **Delete** (on the web, click **Delete**), then answer *"Are you sure you want to delete row ?"*. It is removed when you click **Save** — **and the values already recorded for it at past visits are deleted too.** To stop asking for a parameter but keep its history, set **HIDE** to **YES** instead.

### **Changing the order**

**Change Order** opens **Setup Order**. Select a parameter and press **Ctrl+U** to move it up or **Ctrl+D** to move it down, then click **OK**. Click **Save** to keep the new order — it is the order the parameters are asked in. Change Order needs at least two parameters: *"There must be at least two parameters to change their order."*.

Changing the **Type**, the package or service, or clicking **Refresh** with unsaved changes asks *"The parameter changes are not saved. Discard them?"*. Closing asks *"Are You Sure You Want To Close Without Saving Data?"*.

> **Example — a slimming package.** Pick **Type** *Package* and the *SLIMMING 12 SESSIONS* package. Add *WEIGHT* (Display Name *WEIGHT (KG)*, **Numeric**, **MIN VALUE** 30, **MAX VALUE** 200, **REQUIRED** *YES*), *WAIST* (*WAIST (CM)*, **Numeric**) and *PHOTO* (*PROGRESS PHOTO*, **Image**), then **Save**. Now every time a client on this package checks in, the Parameter Values window asks for her weight, waist and a photo, and shows what was recorded last time, so you can see the progress. A weight below 30 or above 200 is refused — *"Value of WEIGHT (KG) cannot be less than 30"*.

## On the web

The window works the same way on the web, with a **Delete** button above the grid. It opens full screen on tablets and phones. In **Setup Order**, tap a parameter, then use the **Up** and **Down** buttons.


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