> ## Documentation Index > Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt > Use this file to discover all available pages before exploring further. # Sample 3. Step 4: Analyze the images to decide in which order elements must be detected > Plan the element search order for the invoice FlexiLayout in Sample 3: analyze field arrangement and outline the InvoiceHeader group and its elements. Before you create any elements, decide the following: * Is there a pattern in how the fields are arranged on the images? * Which elements can serve as reference elements for field detection? * What element search order works best? At each new step, you can refer only to previously described elements. Analyze the available images. The central part of every image contains a table. In FlexiLayout Studio, a table is an image object made up of fragments that consist of rows and columns visually separated by separator lines or by white gaps. For more information, see [Work with tables](/flexi-capture/fls/tables/general-tables). Above the table is a group of fields you can name **InvoiceHeader**: **Invoice Number**, **Invoice Date**, and **Delivery Address**. The **Invoice Number** field occurs on all the images and can serve as an identifier field, while **Invoice Date** and **Delivery Address** are optional. Below the table is a group of fields you can name **Footer**: **TotalQuantity**, **TotalAmount**, and **Country**. These fields also do not occur on all the images. ## Plan the search for the upper fields Start with the fields in the upper part of the document. Create a logical [Group](/flexi-capture/fls/template/elements-compound) element named **InvoiceHeader** that unites all the elements used to find the **Invoice Number**, **Invoice Date**, and **Delivery Address** fields. These three fields are always in the upper left corner, and their order is always the same: **Delivery Address**, followed by **Invoice Number**, followed by **Invoice Date** (when they occur on the image). Look for them in that order. To find the field-name keywords, use [Static Text](/flexi-capture/fls/template/static-text) elements. The **InvoiceHeader** element must contain these name elements: | Element | Type | Corresponds to | Described in | | :-------------------- | :----------------------------------------------------- | :------------------------------------- | :-------------------------------------------- | | **kwDeliveryAddress** | [Static Text](/flexi-capture/fls/template/static-text) | Name of the **Delivery Address** field | [Step 5](/flexi-capture/fls/tutorial3/3step5) | | **kwInvoiceNumber** | [Static Text](/flexi-capture/fls/template/static-text) | Name of the **Invoice Number** field | [Step 6](/flexi-capture/fls/tutorial3/3step6) | | **kwDate** | [Static Text](/flexi-capture/fls/template/static-text) | Name of the **Invoice Date** field | [Step 7](/flexi-capture/fls/tutorial3/3step7) | Search for the **Invoice Number** and **Invoice Date** fields in the same row as their names, to the right of the names. In the **InvoiceHeader** element, create these field elements: | Element | Type | Corresponds to | Described in | | :---------------- | :-------------------------------------------------------------- | :------------------------------------------------------- | :-------------------------------------------- | | **InvoiceNumber** | [Character String](/flexi-capture/fls/template/character-chain) | The **Invoice Number** field | [Step 8](/flexi-capture/fls/tutorial3/3step8) | | **grDate** | [Group](/flexi-capture/fls/template/elements-compound) | Groups the elements that find the **Invoice Date** field | [Step 9](/flexi-capture/fls/tutorial3/3step9) | In the `InvoiceHeader.grDate` element, create: | Element | Type | Corresponds to | Described in | | :---------------------- | :-------------------------------------------------------------- | :------------------------------------------------------------------------------------------- | :-------------------------------------------- | | **InvoiceDate** | [Date](/flexi-capture/fls/template/date) | The **Invoice Date** field on good-quality images | [Step 9](/flexi-capture/fls/tutorial3/3step9) | | **InvoiceDateAsString** | [Character String](/flexi-capture/fls/template/character-chain) | The **Invoice Date** field when FlexiLayout Studio does not find the **InvoiceDate** element | [Step 9](/flexi-capture/fls/tutorial3/3step9) | For more information about finding dates on poor-quality images, see [Date search after high or low-quality recognition](/flexi-capture/fls/tips-tricks/date2). ## Plan the search for the Delivery Address field The **Delivery Address** field has multiple lines, so use a [Paragraph](/flexi-capture/fls/template/text-chain) element to detect it. Before creating that element, limit the search area as much as possible. Use a [White Gap](/flexi-capture/fls/template/white-gap) element for the right boundary of the search area. Group all the elements that describe the location of the **Delivery Address** field into a [Group](/flexi-capture/fls/template/elements-compound) element. In the **InvoiceHeader** element, create a **Group** element named **grAddress**. For more information, see [Step 10](/flexi-capture/fls/tutorial3/3step10). In the **grAddress** element, create: | Element | Type | Corresponds to | Described in | | :------------------ | :-------------------------------------------------- | :------------------------------------------------------------------------- | :---------------------------------------------- | | **wgAddressRight** | [White Gap](/flexi-capture/fls/template/white-gap) | Auxiliary element that borders the **Delivery Address** field on the right | [Step 11](/flexi-capture/fls/tutorial3/3step11) | | **DeliveryAddress** | [Paragraph](/flexi-capture/fls/template/text-chain) | The **Delivery Address** field | [Step 12](/flexi-capture/fls/tutorial3/3step12) |