As regards the figure, or exceptionally figures, to accompany the abstract, where a European patent application contains drawings, reference should be made to A‑III, 10.3 and F‑II, 2.3 and F-II, 2.4. The figure(s) illustrating the abstract must be the figure(s) most representative of the invention and must be chosen from the drawings accompanying the application. It is therefore not permissible to draw a special figure for the abstract which differs from the other figures in the application.
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/a_ix_2_3.htm
Date retrieved: 17 May 2021