Question: save/F5/colours...

Hi dear Maple's experts, 1.- If I have a variable r0 := x^3, Then, I can save r0 in a file: save r0, "myFile.txt"; Now, if I have some additional variables r1:= y^2+ 10; Is it possible to add r1 to the previous already created "MyFile.txt" (without overwriting the initial file)? 2.- When I work in Maple 10 (worksheet mode).. I woult like not to have to press "F5" to switch from "C 2D Input" to "C Maple Input" . Is it possible to set up "C Maple Input" as default option to write the comands? 3. When I write usually the commands appear in red.. and output appears in blue..It is possible change this colours?. Thanks in advance, JJacques
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