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Ok I understand what your trying to do, I was getting confused by you using the words drawing 1, when you mean "layout 1". So a dwg will be 30+ etc layouts each with 1 title block, the name of the title block will be one of the 3 in the dwg format_f. Watch this space may get a chance later today. Here is a freebie for you makes a drawing index based on 2 attributes. You will need to change to suit your dwg. Yes tested on 88 layouts. (setq bname "DA1DRTXT") ; title block name (setq tag2 "DRG_NO") ;attribute tag name (setq tag3 "WORKS_DESCRIPTION") ;attribute tag name Dwgindex.lsp

XData are for additional non-graphical descriptive information (< 16K) that can be attached to objects. This information can be divided into two parts - for two different main tasks: 1. For programming purposes. As in your example with the numbers of circles defining the order in which they are connected. Or in Jonathan Handojo's ObjectPropertySync.lsp. Etc. AutoCAD itself uses XData for primitive's additional data - in Dimensions, Hatches, Viewports, and so on. 2. For users - to turn their graphical models into object models. In XData, you can define the names (or codes) of the real world entities (features) represented by your graphical primitives. For example, your circles can be defined as ‘fire hydrant’ or ‘storm well’, etc. And in XData, you can define characteristics (attributes, properties) of reality objects (features). For example, depth, material, belonging, purpose, etc. After that, it becomes possible to analyse the drawing as a model of reality and transfer such a model to information systems. To work with XData, we made a set of users tools - XDTOOLS.

Since the size of A1 is half of the A0, the scale should be 1:100 Welcome in the Forum!