> For the complete documentation index, see [llms.txt](https://docs.epicollect.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.epicollect.net/formbuilder/build-your-questionnaire.md).

# Intro

{% hint style="warning" %}
The formbuilder requires a mouse or trackpad so touch device like iPads or Android tablets are not supported yet. We therefore recommend to build your form(s) on a desktop or laptop.

A minimum screen width of **1024 px** is also required to be able to show all the user interface controls.
{% endhint %}

Currently, Epicollect5 allows a maximum of **300** questions per a single form, and a maximum number of **5** linked (hierarchy) forms.

The form builder features a three columns layout:

* Left column: the available inputs
* Middle column: the inputs added to each form
* Right column: the currently selected input settings

![](/files/FIrDWL1IvpaM3U32ZTnL)

By default, each input is shown on a single screen on the mobile app. This allows space for the popup keyboard and the question at the same time. You might want to have more than one question on a page, in that case just use a [**group**](/formbuilder/groups.md).

{% hint style="warning" %}
Remember, **you cannot set jumps on inputs within a group**, just on the group input. [**More on jumps.**](/formbuilder/jumps.md)
{% endhint %}

### Video Tutorials

{% embed url="<https://www.youtube.com/watch?v=w3s9j8_Die8&ab_channel=GuidovanHofwegen>" %}

{% embed url="<https://youtu.be/IWWJRD4yfTk>" %}