Hi, I am new to this and using this Oncoprint plots and need to increase fonts of columns, rows, labels.
thanks for any input.

alter_fun = list(
    background = function(x, y, w, h) {
        grid.rect(x, y, w-unit(0.5, "mm"), h-unit(0.5, "mm"), gp = gpar(fill = "#CCCCCC", col = NA))
    },
    HOMDEL = function(x, y, w, h) {
        grid.rect(x, y, w-unit(0.5, "mm"), h-unit(0.5, "mm"), gp = gpar(fill = "blue", col = NA))
    },
    AMP = function(x, y, w, h) {
        grid.rect(x, y, w-unit(0.5, "mm"), h-unit(0.5, "mm"), gp = gpar(fill = "red", col = NA))
    },
    MUT = function(x, y, w, h) {
        grid.rect(x, y, w-unit(0.5, "mm"), h*0.33, gp = gpar(fill = "#008000", col = NA))
    }
)

col = c("MUT" = "#008000", "AMP" = "red", "HOMDEL" = "blue")

oncoPrint(mat, get_type = function(x) strsplit(x, ";")[[1]],
    alter_fun = alter_fun, col = col, 
    remove_empty_columns = TRUE,
    column_title = "OncoPrint for TCGA Lung Adenocarcinoma, genes in Ras Raf MEK JNK signalling",
    heatmap_legend_param = list(title = "Alternations", at = c("AMP", "HOMDEL", "MUT"), 
    labels = c("Amplification", "Deep deletion", "Mutation")))

https://www.bioconductor.org/packages/devel/bioc/vignettes/ComplexHeatmap/inst/doc/s8.oncoprint.html