For example, it works m := DynamicComposableModel new. m instantiateModels: #(listModel ListModel ). m listModel backgroundColorBlock: [ Color blue ]. m listModel displayBlock: [ :it | it printString]. l := ( SpecLayout composed newRow: #listModel ; yourself ). m listModel items: (1 to: 10). m listModel backgroundColorBlock: [:item :index | Color blue]. m layout: l. m openWithSpec . but it does not work m := DynamicComposableModel new. m instantiateModels: #(listModel MultiColumnListModel ). m listModel backgroundColorBlock: [ Color blue ]. m listModel displayBlock: [ :it | { it printString. it printString} ]. l := ( SpecLayout composed newRow: #listModel ; yourself ). m listModel items: (1 to: 10). m listModel backgroundColorBlock: [:item :index | Color blue]. m layout: l. m openWithSpec . TIA Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 Email: pdigonzelli@softsargentina.com pdigonzelli@gmail.com Cel: 5493815982714 ----- Mensaje original ----- De: "Pablo R. Digonzelli" <pdigonzelli@gmail.com> Para: "Pharo Development List" <pharo-dev@lists.pharo.org> Enviados: Jueves, 26 de Junio 2014 19:53:06 Asunto: Re: [Pharo-dev] spec question Someone knows how to set backgroundColorBlock: in an MultiColumnListBox?. TIA Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 Email: pdigonzelli@softsargentina.com pdigonzelli@gmail.com Cel: 5493815982714 ----- Mensaje original ----- De: "Pablo R. Digonzelli" <pdigonzelli@gmail.com> Para: nicolaihess@web.de, "Pharo Development List" <pharo-dev@lists.pharo.org> Enviados: Jueves, 26 de Junio 2014 19:13:57 Asunto: Re: [Pharo-dev] spec question thanks Nicolai! Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 Email: pdigonzelli@softsargentina.com pdigonzelli@gmail.com Cel: 5493815982714 ----- Mensaje original ----- De: "Nicolai Hess" <nicolaihess@web.de> Para: "Pharo Development List" <pharo-dev@lists.pharo.org> CC: "Any question about pharo is welcome" <pharo-users@lists.pharo.org> Enviados: Jueves, 26 de Junio 2014 18:55:26 Asunto: Re: [Pharo-dev] spec question 2014-06-26 23:13 GMT+02:00 Pablo R. Digonzelli < pdigonzelli@gmail.com > : Hi all, two questions about Spec. 1) How can i change the font for a ListModel or TextModel? 2) I try , but nothing happend . I does not work but there is no error also l := ListModel new. l backgroundColorBlock: [ Color red ]. l openWithSpec . Can I change de backcolor of ListModel ? Sorry for my english. TIA Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 Email: pdigonzelli@softsargentina.com pdigonzelli@gmail.com Cel: 5493815982714 About the font: I don't know if this is possible. For the background color: This works only for the background of the list cells. If there is no entry in your listmodel list, the list view is empty as well and there is nothing to show. This works: ListModel new items: (1 to: 10); backgroundColorBlock: [ :item :index |Color red ]; openWithSpec. or with more colors :) ListModel new items: Color registeredColorNames ; backgroundColorBlock: [ :item :index | Color named:item]; openWithSpec.